(Opening post in-progress, let me know what you think)
Old Tier List: https://www.smogon.com/ingame/guides/bw_ingametiers
Old discussion: http://www.smogon.com/forums/threads/in-game-tier-list-discussion.79041/
Approved by DHR-107
Hello everyone! If you've been around Orange Islands recently, I've shown interest in creating a revival of the Pokemon Black and White In-game Tier List. Now, I know I'm a fairly new user and this is a big undertaking, but I'd love to contribute something to the forums and think I could do it with some help. I think I have the skill to do posts of an acceptable length to keep the thread going (a lot of you seem to enjoy the posts I've made in various threads at least). Plus, Black and White have a very small pool of Pokemon, and a lot of the top tiers are fairly easy to pick out, in my opinion. Also, spoilers for over an 8-year old game.
With all that said, let's start this up!
Pokemon Black / White
In-game Tier List Discussion
What is an in-game tier list?
In-game tier lists rank Pokemon based on their viability and usefulness throughout an entire playthrough of either game. Regarding BW, this constitutes when you begin the game at Nuvema Town from the moment you beat Ghetisis at N's Castle.
What are the tiers?
In this tier list we currently have six tiers. Tiers are based off of the following:
S Tier
A Tier
B Tier
C Tier
D Tier
E Tier
The tier list is alphabetized for convenience. The higher tier a Pokemon is in the more it contributes within an efficient playthrough. You will likely note that this differs from the old tier list in that Top/High/Upper Mid/Mid/Low Mid/Low don't exist (this is because we have gradually shifted from the S-E set of tiers over time, which is one of the reasons why I wanted to update it). In addition, we're tiering Pokemon based on their performance in teams of 3 to 5 Pokemon because those teams are most common among casual players. We will also be having a discussion slate on mons that we are currently testing.
Why is a Pokémon in a certain tier?
Pokemon are ranked under the following 5 factors:
Availability: This is how early a Pokemon arrives in the game and how hard it is to find (read: encounter rate). Does it require backtracking, HM moves, or otherwise have a low encounter rate?
However, Pokemon will be ranked regardless of version (example: Sawk/Throh being available in both games).
Typing - A Pokemon's typing can be of great importance for an efficiency playthrough. How does the typing match-up work against the entire game? If a Pokemon has better typing it is often considered a higher rank.
For example, one Pokemon line i'd point out for typing peculiarity is Sewaddle's family of Bug/Grass types (which I will be referring to Leavanny from here on). On paper, this looks dreadful: Quad weaknesses to Fire and Flying, along with single weaknesses to Bug, Ice, Poison, and Rock are a major hurdle that the user has to accept when picking the cute Pokemon. On the other hand, Leavanny also has quad resistances to Grass and Ground, as well as single resistances to Electric, Fighting (important) and Water. Leavanny doesn't match up well against the gyms save Clay, but it has sweeping potential against 3 of the Elite 4 with Swords Dance. This is definitely a Pokemon I want some of the early discussion focused on as it has some big positives and some huge negatives, unlike Pokemon like Cottonee/Petilil which are more straightforward (leaning toward B Tier myself for reference).
Stats - A Pokemon's stat distribution is crucial for a Pokemon's success. Does the Pokemon have a stat distribution that supplements the Pokemon's movepool and typing? If a Pokemon has a stat distribution that favors its both typing and movepool it will often be higher on the tier list. In general, a Pokemon that is often slower than it is faster will often be ranked lower on a tier list.
One example of stats not matching a movepool are the Pidove line. Despite having a 105 base Attack in Gen V as Unfezant, the line gets almost no physical attacks aside from Quick Attack (level 15) Return (TM) Fly (HM) (U-Turn TM is postgame) while its movepool is specially oriented with Unfezant having a laughable 65 base 65 Special Attack. On the other hand, a lot of people in the old thread said Pidove was actually decent (I think people were saying Upper Mid?) so this is another Pokemon I want early discussion focused on. To a lesser extent, Blitzle has this problem as well.
Movepool - A Pokemon's movepool (both level-up and TM/HM) are crucial for a Pokemon. What moves does the Pokemon naturally get and can possibly obtain? Unlike with past games, TMs are of infinite use, and thus have no opportunity cost. With that being said, if a Pokemon requires a TM found in a detour off the main path (like TM24 Thunderbolt on Route 18 with Surf, or TM47 Low Sweep in lower Wellspring Cave with Surf) this will knock it down a bit.
An example of a Pokemon with a great natural movepool is Darumaka. After the slight rut of Fire Fang for a few levels, Fire Punch at level 22 is pretty much all you need. Belly Drum is mostly overkill at level 30, and Flare Blitz at level 35 is basically “I WILL raze anything in front of me.” Only really bulky resists can take one, but the recoil means it’s impractical against mooks. Dig, Rock Tomb, and Work Up can be taught easily via TM (Work Up is learned naturally at 25 as well), and Headbutt (starting move) is decent until Thrash (level 27) or max power Return via TM. Superpower at level 47 or Brick Break via TM help. In other words, you could feasibly use it even without giving it a single TM, and even if you did, all the TMs it might want are easily accessible.
Major Battles - Major battles consist of Gym Leaders, Team Plasma encounters, Rival encounters, the Elite 4, and N and Ghetsis. How does the Pokemon contribute to major battles? A Pokemon that contributes to many major battles will often be seen higher than those that do not.
A Pokemon that does great in many major battles is Scraggy/Scrafty. Barring Elesa and (aside from maybe Swoobat) Skyla, it can contribute in every major battle with an obscene High Jump Kick at level 31 or Brick Break at only level 20. It can hold it's own against Clay's Excadrill or Krokorok, smashes Brycen, handles the rivals (especially Bianca and N) well, and can help against Drayden (who often goes last with lolDragon Tail). In the Elite 4, Scrafty laughs at all but Marshall by virtue of its Fighting/Dark type alone, and both N and Ghetsis have several Pokemon that fall to Scrafty. This Pokemon in my opinion is an easy A, and maybe even S if you are feeling generous (though I can see the arguments of slow Speed and late evo working against it, though neither have given me much problems when I used it because the movepool is so good).
Which Pokemon are available for the player to use in Pokemon Black and White Versions?
What tools are allowed for the player to use?
The player is allowed to use any legitimate means within the cartridge for completing the game efficiently. The player is only allowed to trade to evolve Pokemon and not to receive outside help otherwise. The player is allowed to use items such as X Items, Potions, TMs, and Berries. Keep in mind that items have opportunity costs associated with them and can still contribute to a Pokemon negatively if it requires a multitude of items. Personally, I generally don't bother with X items myself, and I can't think of any mon in Black and White that would need them.
Tier List Key
This signifies what game a Pokemon can be caught in, and whether they need a trade to evolve.
BW: Both versions
B: Black Version only
W: White Version only
(Trade) - Pokemon is ranked based off of trading for its evolution.
(No Trade) - Pokemon is ranked based off of no trade accessible to the player (this does not include in-game trades).
These following Pokemon unless otherwise noted are version exclusive:
Black (B): Gothita (Routes 16 and 5, 30%, Gothorita (Route 9, 30%), Gothitelle (Route 9, 5%, rustling grass)
Tornadus (roamer post eight badges, level 40, male)
Vullaby (Route 10, 30%) and Mandibuzz (you can catch it postgame so it is untiered catching it that way)
Reshiram: N's Castle, forced capture, 2 battles left. Yeah, F-tier because there is 2 battles left and Reshiram is only decent against N (Ghetsis laughs at it).
White (W): Solosis (Routes 16 and 5, 30%, Duosion (Route 9, 30%), Reuniclus (Route 9, 5%, rustling grass)
Thundurus (roamer post eight badges, level 40, male)
Rufflet (Route 10, 30%) and Braviary (you can catch it postgame so it is untiered catching it that way)
Zekrom: N's Castle, forced capture, 2 battles left. Yeah, F-tier because there is 2 battles left and Zekrom isn't quite as decent as Reshiram is against the last two fights (Ghetsis laughs at it).
Gothita vs. Solosis quick review: Both are mediocre IMO. Both can get Screens / Thunder Wave via TMS immediately (which is nice), while Gothita alone can learn Grass Knot. Gothita line has a pretty useless ability but less of a movepool rut than Solosis, while Solosis has the great Magic Guard but a serious lack of good moves besides Psychic STAB. Gothita's slightly higher Speed and useless ability balance out Solosis's lower speed, movepool rut, and Magic Guard, so I could see both at C-tier. If you want a Psychic, just go for Sigilyph; Munna is okay but has movepool issues and Elgyem is late and evolves late).
Tornadus vs. Thundurus: Eh. Yeah, you can Master Ball them, but it's post 8 badges, so there's not much game left, and they don't have amazing endgame matchups. You can TM Brick Break and Sludge Bomb immediately, but I don't see why these would be better than what you already have. If you want an endgame legend, I'd go for Terrakion instead, and if you want a legend in general that isn't terribly late, Cobalion is good but requires a detour (another mon I want discussion on as a lot were praising Cobalion in the old thread). Can't see Tornadus vs. Thundurus going above D-tier at best really.
Vullaby vs. Rufflet: Both suck hard, are crazy late with a dumb evo level. I've gotten Mandibuzz pre-E4. but don't use either, they suck maingame. I would say E-tier, borderline F-tier for both, though Braviary is slightly more useful.
Reshiram vs. Zekrom: See above (both are too late to do much).
Exceptions:
In Pinwheel Forest's Outer area in Black Version, Sawk would get a good nod, as it has an acceptable 10% encounter rate, while you only have a 5% chance to find its counterpart Throh in rustling grass at a 5% rate, in contrast to White where Throh is 10% in the regular and dark grass and Sawk is 5% in the rustling grass. Sawk would be ranked higher in Black but lower in White, and vice versa for Throh. As for a small review, I would say Sawk is better due to Sturdy and sweeper stats, but Throh is probably only a notch below it as while slow, its stats are superior to most other things at the time.
Cottonee (in the wild in Black) and Petilil (in the wild in White). In White, Cottonee can be obtained from trading a Petilil to Dye in the southeastern side of Nacrene City, while in Black, Petilil can be obtained from trading a Cottonee to Dye in in the same area. Regardless of version, the mon you recieve is a female at level 15 with Modest nature and 20/20/20/31/20/20 IVs. As for Abilities, Cottonee has Prankster (what it needs) while Petilil has Clorophyll (worse than Own Tempo, but you could still get by with Giga Drain/switching after Petal Dance).
As for a quick review on which one the player should pick, Petilil is better regardless if you trade or not, as Cottonee just lacks raw firepower to be good even with great IVs. Also, Cotton Guard on Cottonee is kind of overrated anyway (I've used it in Unova myself in BW2 and MAYBE BW1) since Whimsicott is ineffective against gyms past Clay, and even in the E4 you really only have Grimsley and Marshall to set up on, with the former having super effective moves and the latter having Stone Edge on all his mons save Mienshao with a super-effective U-turn. Otherwise, the only other targets you hit are Shauntal's Jellicent and Golurk. Against N and Ghetsis, both mons can only really hit Carracosta and Seismitoad super-effectively, so they are not superstars of endgame, only decent.
Trade evolutions: Gigalith (obtained by catching Roggenrola in Wellspring Cave at 50% encounter rate and evolving to Boldore level 25 or in later areas), Conkeldurr (obtained by catching Timburr in Pinwheel Forest (Outer) at 20% encounter rate and evolving to Gurdurr at level 25 or in later areas), Karrablast (Route 6, 25%, trade Karrablast for Shelmet), Shelmet (Route 8, Icirrus City, Moor of Icirrus, 40% in any season save Winter where its unavailable, trade Shelmet for Karrablast).
Other in-game trades:
Black: Trade Mincinno to Youngster Kyle in Driftveil City: Recieve Red-Striped Basculin, level 25, Sitrus Berry, male, Reckless, Adamant, 20/31/20/20/20/20 IVs.
White: Trade Mincinno to Youngster Kyle in Driftveil City: Recieve Blue-Striped Basculin, level 25, Sitrus Berry, male, Rock Head, Adamant, 20/31/20/20/20/20 IVs.
Note you can get either variant of Basculin in both games. Red-Striped are common in Black while Blue-Striped are common in White, but the opposite version is always found in the respective versions by Surfing into rippling water. Note that while the traded Basculin have good IVs and Nature, I don't recommend these trade Basculin because Adaptability is so much better (albeit gotten after Surf).
Both games: Trade Boldore for Emolga with Hiker Manny on Route 7, Emolga is male, level 30, with Lum Berry, Lax, 20/20/31/20/20/20 IVs.
Meh. You have great moves like Electro Ball and Acrobatics with Emolga at level 30, but it misses out on earlier fights compared to catching it earlier, and Joltik is available around the same time.
Current Tier List Rankings
Here is my opinion on what should be on the tiers so far (with descriptions taken from Its_A_Random's https://www.smogon.com/forums/threads/pokémon-x-y-in-game-tier-list-discussion-mkii.3517128/ thread):
S tier: Reserved for Pokémon who possess the highest levels of efficiency of the available options in the Pokémon Black & White versions. Pokémon in this tier are able to OHKO or 2HKO an overwhelming majority of opponents, limiting the amount of attacks used against them, and possess minimal reliance on items to help assist them defeat opponents at like levels. These Pokémon typically show up before the late-game and any flaws they have are absolutely made up by their advantages.
Darumaka
Drilbur
Scraggy
A tier: Reserved for Pokémon whose efficiency in terms of completing the game is considered to be very high. Pokémon in this tier are able to OHKO or 2HKO a lot of opponents and are not very reliant on items to succeed, but either have some visible flaws that hurt their efficiency or have their usefulness counterbalanced by a late arrival.
Archen
Axew
Timburr (trade)
Lillipup
Oshawott
Panpour
Petilil
Roggenrola (trade)
Sandile
Sawk
Solosis
Throh
B-Tier: Reserved for Pokémon whose efficiency in terms of completing the game is considered to be high. Pokémon in this tier are able to OHKO or 2HKO a fair chunk of opponents and may have a bit of item reliance to assist in sweeping opponents. These Pokémon are still very useful but either have several visible flaws holding them back or come fairly late.
Dwebble
Coballion
Ferroseed
Joltik
Karrablast (trade)
Litwick
Pansage
Sigilyph
Timburr (no trade)
Tepig
Tympole
C-Tier: Reserved for Pokémon whose efficiency in terms of completing the game is considered to be moderately high. Pokémon in this tier are able to OHKO or 2HKO a reasonable portion of opponents but are matchup-based enough to need some item reliance to assist in sweeping some opponents. These Pokémon are useful but either have several visible flaws holding them back or barely make up for their late arrivals.
Audino
Basculin
Blitzle
Cottonee
Deerling
Druddigon
Ducklett
Elgyem
Emolga
Gothita
Klink
Mincinno
Munna
Pansear
Sewaddle
Snivy
Tirtouga
Vanillite
Venipede
D-Tier: Reserved for Pokémon whose efficiency in terms of completing the game is considered to be average. Pokémon in this tier are able to OHKO or 2HKO a small amount of opponents and tend to be matchup-based enough to need item reliance to assist in sweeping a few opponents. The usefulness of these Pokémon are typically counterbalanced by many visible flaws or are useful Pokémon that come very late.
Bouffalant
Cubchoo
Durant
Foongus
Frillish
Golett
Purrloin
Maractus
Mienfoo
Patrat
Pidove
Roggenrola (no trade)
Shelmet (trade)
Stunfisk
Terrakion
Tynamo
Virizion
Woobat
Yamask
E-Tier: Reserved for Pokémon whose efficiency in terms of completing the game is considered to be low. Pokémon in this tier are generally only able to OHKO or 2HKO specific opponents and suffer from being matchup-based, generally relying on items to assist in sweeping several opponents. These Pokémon either have flaws that outshine its strengths or are otherwise decent Pokémon that come too late to be of any major use.
Alomomola
Cryogonal
Deino
Heatmor
Karrablast (no trade)
Larvesta
Pawniard
Rufflet
Shelmet (no trade)
Thundurus
Tornadus
Trubbish
Vullaby
Untiered: These Pokemon can't be obtained in-game without use of events or come postgame and thus can't be tiered. The exceptions are Reshiram and Zekrom, who are barely in-time for the end of the game.
Genesect
Keldeo
Kyurem
Landorus
Meloetta
Reshiram
Victini
Zekrom
Zoroark
Zorua
Will update more later if more people show interest (should be easier after this opening post is settled).
As for the first discussion slate, what is everyone's thoughts on Munna, Sewaddle, Timburr (both with and without trade) and Coballion? Note that if you have other thoughts, even about the top tiers, feel free to post them; it still promotes discussion even though they aren't the main focus.
Thanks for reading, and happy posting!
Also we do not drop things ever.
We do not drop things ever.
We do not drop things ever.
If you are going to use something, use it the whole game, no exceptions.
Old Tier List: https://www.smogon.com/ingame/guides/bw_ingametiers
Old discussion: http://www.smogon.com/forums/threads/in-game-tier-list-discussion.79041/
Approved by DHR-107
Hello everyone! If you've been around Orange Islands recently, I've shown interest in creating a revival of the Pokemon Black and White In-game Tier List. Now, I know I'm a fairly new user and this is a big undertaking, but I'd love to contribute something to the forums and think I could do it with some help. I think I have the skill to do posts of an acceptable length to keep the thread going (a lot of you seem to enjoy the posts I've made in various threads at least). Plus, Black and White have a very small pool of Pokemon, and a lot of the top tiers are fairly easy to pick out, in my opinion. Also, spoilers for over an 8-year old game.
With all that said, let's start this up!
Pokemon Black / White
In-game Tier List Discussion

What is an in-game tier list?
In-game tier lists rank Pokemon based on their viability and usefulness throughout an entire playthrough of either game. Regarding BW, this constitutes when you begin the game at Nuvema Town from the moment you beat Ghetisis at N's Castle.
What are the tiers?
In this tier list we currently have six tiers. Tiers are based off of the following:
S Tier
A Tier
B Tier
C Tier
D Tier
E Tier
The tier list is alphabetized for convenience. The higher tier a Pokemon is in the more it contributes within an efficient playthrough. You will likely note that this differs from the old tier list in that Top/High/Upper Mid/Mid/Low Mid/Low don't exist (this is because we have gradually shifted from the S-E set of tiers over time, which is one of the reasons why I wanted to update it). In addition, we're tiering Pokemon based on their performance in teams of 3 to 5 Pokemon because those teams are most common among casual players. We will also be having a discussion slate on mons that we are currently testing.
Why is a Pokémon in a certain tier?
Pokemon are ranked under the following 5 factors:
Availability: This is how early a Pokemon arrives in the game and how hard it is to find (read: encounter rate). Does it require backtracking, HM moves, or otherwise have a low encounter rate?
However, Pokemon will be ranked regardless of version (example: Sawk/Throh being available in both games).
Typing - A Pokemon's typing can be of great importance for an efficiency playthrough. How does the typing match-up work against the entire game? If a Pokemon has better typing it is often considered a higher rank.
For example, one Pokemon line i'd point out for typing peculiarity is Sewaddle's family of Bug/Grass types (which I will be referring to Leavanny from here on). On paper, this looks dreadful: Quad weaknesses to Fire and Flying, along with single weaknesses to Bug, Ice, Poison, and Rock are a major hurdle that the user has to accept when picking the cute Pokemon. On the other hand, Leavanny also has quad resistances to Grass and Ground, as well as single resistances to Electric, Fighting (important) and Water. Leavanny doesn't match up well against the gyms save Clay, but it has sweeping potential against 3 of the Elite 4 with Swords Dance. This is definitely a Pokemon I want some of the early discussion focused on as it has some big positives and some huge negatives, unlike Pokemon like Cottonee/Petilil which are more straightforward (leaning toward B Tier myself for reference).
Stats - A Pokemon's stat distribution is crucial for a Pokemon's success. Does the Pokemon have a stat distribution that supplements the Pokemon's movepool and typing? If a Pokemon has a stat distribution that favors its both typing and movepool it will often be higher on the tier list. In general, a Pokemon that is often slower than it is faster will often be ranked lower on a tier list.
One example of stats not matching a movepool are the Pidove line. Despite having a 105 base Attack in Gen V as Unfezant, the line gets almost no physical attacks aside from Quick Attack (level 15) Return (TM) Fly (HM) (U-Turn TM is postgame) while its movepool is specially oriented with Unfezant having a laughable 65 base 65 Special Attack. On the other hand, a lot of people in the old thread said Pidove was actually decent (I think people were saying Upper Mid?) so this is another Pokemon I want early discussion focused on. To a lesser extent, Blitzle has this problem as well.
Movepool - A Pokemon's movepool (both level-up and TM/HM) are crucial for a Pokemon. What moves does the Pokemon naturally get and can possibly obtain? Unlike with past games, TMs are of infinite use, and thus have no opportunity cost. With that being said, if a Pokemon requires a TM found in a detour off the main path (like TM24 Thunderbolt on Route 18 with Surf, or TM47 Low Sweep in lower Wellspring Cave with Surf) this will knock it down a bit.
An example of a Pokemon with a great natural movepool is Darumaka. After the slight rut of Fire Fang for a few levels, Fire Punch at level 22 is pretty much all you need. Belly Drum is mostly overkill at level 30, and Flare Blitz at level 35 is basically “I WILL raze anything in front of me.” Only really bulky resists can take one, but the recoil means it’s impractical against mooks. Dig, Rock Tomb, and Work Up can be taught easily via TM (Work Up is learned naturally at 25 as well), and Headbutt (starting move) is decent until Thrash (level 27) or max power Return via TM. Superpower at level 47 or Brick Break via TM help. In other words, you could feasibly use it even without giving it a single TM, and even if you did, all the TMs it might want are easily accessible.
Major Battles - Major battles consist of Gym Leaders, Team Plasma encounters, Rival encounters, the Elite 4, and N and Ghetsis. How does the Pokemon contribute to major battles? A Pokemon that contributes to many major battles will often be seen higher than those that do not.
A Pokemon that does great in many major battles is Scraggy/Scrafty. Barring Elesa and (aside from maybe Swoobat) Skyla, it can contribute in every major battle with an obscene High Jump Kick at level 31 or Brick Break at only level 20. It can hold it's own against Clay's Excadrill or Krokorok, smashes Brycen, handles the rivals (especially Bianca and N) well, and can help against Drayden (who often goes last with lolDragon Tail). In the Elite 4, Scrafty laughs at all but Marshall by virtue of its Fighting/Dark type alone, and both N and Ghetsis have several Pokemon that fall to Scrafty. This Pokemon in my opinion is an easy A, and maybe even S if you are feeling generous (though I can see the arguments of slow Speed and late evo working against it, though neither have given me much problems when I used it because the movepool is so good).
Which Pokemon are available for the player to use in Pokemon Black and White Versions?
# Pokemon Availability
0 Victini Liberty Garden (requires Liberty Pass)
1 Snivy Starter Pokémon from Professor Juniper in Nuvema Town
2 Servine Evolve Snivy at level 17
3 Serperior Evolve Servine at level 36
4 Tepig Starter Pokémon from Professor Juniper in Nuvema Town
5 Pignite Evolve Tepig at level 17
6 Emboar Evolve Pignite at level 36
7 Oshawott Starter Pokémon from Professor Juniper in Nuvema Town
8 . Dewott Evolve Oshawott at level 17
9 Samurott Evolve Dewott at level 36
10 Patrat Route 1, Route 2, Route 3, Dreamyard
11 Watchog Route 1 (dark grass, requires Surf), Route 7, P2 Laboratory
12 Lillipup Route 1, Route 2, Route 3
13 Herdier Route 1 (dark grass, requires Surf), Route 10, Cold Storage, P2 Laboratory
14 Stoutland Route 10, Cold Storage
15 Purrloin Route 2, Route 3, Dreamyard
16 Liepard Route 5, Route 9, Route 16
17 Pansage Rustling grass in inner Pinwheel/Lostlorn Forest, Gift in Dreamyard if starter was Tepig
18 Simisage Evolve Pansage with Leaf Stone in Castelia City
19 . Pansear Rustling grass in inner Pinwheel/Lostlorn Forest, Gift in Dreamyard if starter was Oshawott
20 Simisear Evolve Pansear with Fire Stone in Castelia City
21 Panpour Rustling grass in inner Pinwheel/Lostlorn Forest, Gift in Dreamyard if starter was Snivy
22 Simipour Evolve Panpour with Water Stone in Castelia City
23 Munna Dreamyard
24 Musharna Shaking grass in Dreamyard
25 Pidove Route 3, Pinwheel Forest
26 Tranquill Route 6, Route 7, Route 12, Pinwheel Forest, Lostlorn Forest, Dragonspiral Tower
27 Unfezant Route 6, Route 7, Route 12, Pinwheel Forest, Lostlorn Forest
28 Blitzle Route 3
29 Zebstrika Route 7
30 Roggenrola Wellspring Cave
31 Boldore Chargestone Cave, Mistralton Cave, Twist Mountain, Victory Road
32 Gigalith Evolve Boldore
33 Woobat Wellspring Cave, Mistralton Cave, Twist Mountain, Victory Road
34 Swoobat Evolve Woobat with high friendship
35 Drilbur Wellspring Cave, Chargestone Cave, Mistralton Cave, Twist Mountain
36 Excadrill Victory Road, Giant Chasm
37 Audino In rustling grass wherever there is grass
38 Timburr Outer Pinwheel Forest, Cold Storage
39 Gurdurr Twist Mountain
40 Conkeldurr Trade Gurdurr
41 Tympole Outer Pinwheel Forest
42 Palpitoad Non-frozen puddles of Icirrus City, Route 8, Moor of Icirrus, evolve Tympole at level 25
43 Seismitoad Surf in Icirrus City, Route 8, Moor of Icirrus, evolve Palpitoad at level 36
44 Throh Outer Pinwheel Forest, Dark Grass of Victory Road, Route 10
45 Sawk Outer Pinwheel Forest, Outdoors Victory Road, Route 10
46 Sewaddle Pinwheel Forest
47 Swadloon Pinwheel Forest, Lostlorn Forest, Route 6
48 Leavanny Lostlorn Forest, Route 6
49 Venipede Pinwheel Forest, Lostlorn Forest
50 Whirlipede Pinwheel Forest, evolve Venipede at level 22
51 Scolipede Evolve Whirlipede at level 30
52 Cottonee (In Black) Pinwheel Forest, Lostlorn Forest, (In White) Trade Petilil in Nacrene City
53 Whimsicott (Black only) Pinwheel Forest, Lostlorn Forest, evolve Cottonee with Sun Stone
54 Petilil (In Black) Trade Cottonee in Nacrene City, (In White) Pinwheel Forest, Lostlorn Forest
55 Lilligant (White only) Pinwheel Forest, Lostlorn Forest, evolve Cottonee with Sun Stone
56 Basculin Surf anywhere with water. Alternate form found in bubbling water
57 Sandile Route 4, Desert Resort, Relic Castle
58 Krokorok Relic Castle, evolve Sandile at level 29
59 Krookodile Evolve Krokorok at level 40
60 Darumaka Route 4, Desert Resort
61 Darmanitan Evolve Darumaka at level 35. Zen Mode Darmanitan - RageCandyBar Relic Castle statues
62 Maractus Desert Resort
63 Dwebble Desert Resort, Route 18
64 Crustle Route 18
65 Scraggy Route 1 (Surf), Route 4, Route 18, Desert Resort, P2 Laboratory
66 Scrafty Evolve Scraggy at level 39
67 Sigilyph Desert Resort
68 Yamask Relic Castle
69 Cofagrigus Relic Castle
70 Tirtouga Revive from Cover Fossil (Obtain from Backpacker in Relic Castle)
71 Carracosta Evolve Tirtouga at level 37
72 Archen Revive from Cover Fossil (Obtain from Backpacker in Relic Castle)
73 Archeops Evolve Archen at level 37
74 Trubbish Route 5, Route 16
75 Garbodor Route 9, evolve Trubbish at level 34
76 Zorua Castelia City if you have fateful encounter Celebi from Relocator
77 Zoroark Lostlorn Forest with shiny Entei, Raikou, or Suicune from Relocator, evolve Zorua at level 30
78 Minccino Route 5, Route 9, Route 16, Cold Storage
79 Cinccino Route 5, Route 9, Route 16, Cold Storage
80 Gothita (Black only) Route 5, Route 16
81 Gothorita (Black only) Route 9
82 Gothitelle (Black only) Route 9
83 Solosis (White only) Route 5, Route 16
84 Duosion (White only) Route 9
85 Reuniclus (White only) Route 9
86 Ducklett Driftveil Drawbridge
87 Swanna Evolve Ducklett at level 35
88 Vanillite Cold Storage, Route 6, Dragonspiral Tower in Winter
89 Vanillish Dragonspiral Tower in Winter, evolve Vanillite at level 35
90 Vanilluxe Evolve Vanillish at level 47
91 Deerling Route 6, Route 7, Dragonspiral Tower
92 Sawsbuck Outside Dragonspiral Tower, evolve Deerling at level 36
93 Emolga (All rustling) - Route 5, 6, 7, 9, 10, 11, 16, Dragonspiral Tower, Lostlorn Forest, Route 7 Trade
94 Karrablast Route 6, Route 10
95 Escavalier Trade Karrablast for Shelmet
96 Foongus Route 6, Route 7, Route 10 (fake Poké Ball)
97 Amoonguss Route 10, evolve Foongus at level 39
98 Frillish Surf in Route 4, Route 17, Route 18, Driftveil City, P2 Laboratory
99 Jellicent Surf in Route 4, Route 17, Route 18, Driftveil City, P2 Laboratory, evolve Frillish at level 40
100 Alomomola Surf in Route 4, Route 17, Route 18, Driftveil City, P2 Laboratory
101 Joltik Chargestone Cave
102 Galvantula Evolve Joltik at level 36
103 Ferroseed Chargestone Cave
104 Ferrothorn Evolve Ferroseed
105 Klink Chargestone Cave, P2 Laboratory
106 Klang Evolve Klink at level 38
107 Klinklang Evolve Klang at level 49
108 Tynamo Chargestone Cave
109 Eelektrik Evolve Tynamo at level 39
110 Eelektross Evolve Eelektrik with Thunder Stone
111 Elgyem Celestial Tower (3F-5F)
112 Beheeyem Evolve Elgyem at level 42
113 Litwick Celestial Tower (all floors)
114 Lampent Evolve Litwick at level 41
115 Chandelure Evolve Lampent with Dusk Stone (Mistralton Cave, Route 10)
116 Axew Mistralton Cave
117 Fraxure Victory Road, evolve Axew at level 38
118 Haxorus Evolve Fraxure at level 48
119 Cubchoo Twist Mountain, Route 7, Dragonspiral Tower in Winter
120 Beartic Dragonspiral Tower in Winter, evolve Cubchoo at level 37
121 Cryogonal Twist Mountain
122 Shelmet Route 8, Icirrus City, Moor of Icirrus except in Winter
123 Accelgor Trade Shelmet for Karrablast
124 Stunfisk Route 8, Icirrus City
125 Mienfoo Dragonspiral Tower, Victory Road
126 Mienshao Evolve Mienfoo at level 50
127 Druddigon Dragonspiral Tower
128 Golett Dragonspiral Tower (2F)
129 Golurk Evolve Golett at level 43
130 Pawniard Route 9
131 Bisharp Evolve Pawniard at level 52
132 Bouffalant Route 10
133 Rufflet (White only) Route 10, Victory Road
134 Braviary (White only) Evolve Rufflet at level 54
135 Vullaby (Black only) Route 10, ]Victory Road
136 Mandibuzz (Black only) Evolve Vullaby at level 54
137 Heatmor Victory Road (outer)
138 Durant Victory Road
139 Deino Victory Road
140 Zweilous Evolve Deino at level 50
141 Hydreigon Evolve Zweilous
142 Larvesta Hatch egg from Pokémon Ranger in Route 18
143 Volcarona Evolve Larvesta at level 59, Relic Castle (level 70 postgame version is untiered)
144 Cobalion Guidance Chamber of Mistralton Cave
145 Terrakion Victory Road, must capture Cobalion first
146 Virizion Rumination Field of Pinwheel Forest, must capture Cobalion first
147 Tornadus (Black only) Roaming Unova after seeing it in Route 7
148 Thundurus (White only) Roaming Unova after seeing it in Route 7
149 Reshiram (Black only) N's Castle, or Dragonspiral Tower if party and PC were full in N's Castle
150 Zekrom (White only) N's Castle, or Dragonspiral Tower if party and PC were full in N's Castle
151 Landorus Abundant Shrine (untiered, must have Tornadus and Thundurus)
152 Kyurem Giant Chasm (untiered)
153 Keldeo Event (untiered)
154 Meloetta Event (untiered)
155 Genesect Event (untiered)
0 Victini Liberty Garden (requires Liberty Pass)
1 Snivy Starter Pokémon from Professor Juniper in Nuvema Town
2 Servine Evolve Snivy at level 17
3 Serperior Evolve Servine at level 36
4 Tepig Starter Pokémon from Professor Juniper in Nuvema Town
5 Pignite Evolve Tepig at level 17
6 Emboar Evolve Pignite at level 36
7 Oshawott Starter Pokémon from Professor Juniper in Nuvema Town
8 . Dewott Evolve Oshawott at level 17
9 Samurott Evolve Dewott at level 36
10 Patrat Route 1, Route 2, Route 3, Dreamyard
11 Watchog Route 1 (dark grass, requires Surf), Route 7, P2 Laboratory
12 Lillipup Route 1, Route 2, Route 3
13 Herdier Route 1 (dark grass, requires Surf), Route 10, Cold Storage, P2 Laboratory
14 Stoutland Route 10, Cold Storage
15 Purrloin Route 2, Route 3, Dreamyard
16 Liepard Route 5, Route 9, Route 16
17 Pansage Rustling grass in inner Pinwheel/Lostlorn Forest, Gift in Dreamyard if starter was Tepig
18 Simisage Evolve Pansage with Leaf Stone in Castelia City
19 . Pansear Rustling grass in inner Pinwheel/Lostlorn Forest, Gift in Dreamyard if starter was Oshawott
20 Simisear Evolve Pansear with Fire Stone in Castelia City
21 Panpour Rustling grass in inner Pinwheel/Lostlorn Forest, Gift in Dreamyard if starter was Snivy
22 Simipour Evolve Panpour with Water Stone in Castelia City
23 Munna Dreamyard
24 Musharna Shaking grass in Dreamyard
25 Pidove Route 3, Pinwheel Forest
26 Tranquill Route 6, Route 7, Route 12, Pinwheel Forest, Lostlorn Forest, Dragonspiral Tower
27 Unfezant Route 6, Route 7, Route 12, Pinwheel Forest, Lostlorn Forest
28 Blitzle Route 3
29 Zebstrika Route 7
30 Roggenrola Wellspring Cave
31 Boldore Chargestone Cave, Mistralton Cave, Twist Mountain, Victory Road
32 Gigalith Evolve Boldore
33 Woobat Wellspring Cave, Mistralton Cave, Twist Mountain, Victory Road
34 Swoobat Evolve Woobat with high friendship
35 Drilbur Wellspring Cave, Chargestone Cave, Mistralton Cave, Twist Mountain
36 Excadrill Victory Road, Giant Chasm
37 Audino In rustling grass wherever there is grass
38 Timburr Outer Pinwheel Forest, Cold Storage
39 Gurdurr Twist Mountain
40 Conkeldurr Trade Gurdurr
41 Tympole Outer Pinwheel Forest
42 Palpitoad Non-frozen puddles of Icirrus City, Route 8, Moor of Icirrus, evolve Tympole at level 25
43 Seismitoad Surf in Icirrus City, Route 8, Moor of Icirrus, evolve Palpitoad at level 36
44 Throh Outer Pinwheel Forest, Dark Grass of Victory Road, Route 10
45 Sawk Outer Pinwheel Forest, Outdoors Victory Road, Route 10
46 Sewaddle Pinwheel Forest
47 Swadloon Pinwheel Forest, Lostlorn Forest, Route 6
48 Leavanny Lostlorn Forest, Route 6
49 Venipede Pinwheel Forest, Lostlorn Forest
50 Whirlipede Pinwheel Forest, evolve Venipede at level 22
51 Scolipede Evolve Whirlipede at level 30
52 Cottonee (In Black) Pinwheel Forest, Lostlorn Forest, (In White) Trade Petilil in Nacrene City
53 Whimsicott (Black only) Pinwheel Forest, Lostlorn Forest, evolve Cottonee with Sun Stone
54 Petilil (In Black) Trade Cottonee in Nacrene City, (In White) Pinwheel Forest, Lostlorn Forest
55 Lilligant (White only) Pinwheel Forest, Lostlorn Forest, evolve Cottonee with Sun Stone
56 Basculin Surf anywhere with water. Alternate form found in bubbling water
57 Sandile Route 4, Desert Resort, Relic Castle
58 Krokorok Relic Castle, evolve Sandile at level 29
59 Krookodile Evolve Krokorok at level 40
60 Darumaka Route 4, Desert Resort
61 Darmanitan Evolve Darumaka at level 35. Zen Mode Darmanitan - RageCandyBar Relic Castle statues
62 Maractus Desert Resort
63 Dwebble Desert Resort, Route 18
64 Crustle Route 18
65 Scraggy Route 1 (Surf), Route 4, Route 18, Desert Resort, P2 Laboratory
66 Scrafty Evolve Scraggy at level 39
67 Sigilyph Desert Resort
68 Yamask Relic Castle
69 Cofagrigus Relic Castle
70 Tirtouga Revive from Cover Fossil (Obtain from Backpacker in Relic Castle)
71 Carracosta Evolve Tirtouga at level 37
72 Archen Revive from Cover Fossil (Obtain from Backpacker in Relic Castle)
73 Archeops Evolve Archen at level 37
74 Trubbish Route 5, Route 16
75 Garbodor Route 9, evolve Trubbish at level 34
76 Zorua Castelia City if you have fateful encounter Celebi from Relocator
77 Zoroark Lostlorn Forest with shiny Entei, Raikou, or Suicune from Relocator, evolve Zorua at level 30
78 Minccino Route 5, Route 9, Route 16, Cold Storage
79 Cinccino Route 5, Route 9, Route 16, Cold Storage
80 Gothita (Black only) Route 5, Route 16
81 Gothorita (Black only) Route 9
82 Gothitelle (Black only) Route 9
83 Solosis (White only) Route 5, Route 16
84 Duosion (White only) Route 9
85 Reuniclus (White only) Route 9
86 Ducklett Driftveil Drawbridge
87 Swanna Evolve Ducklett at level 35
88 Vanillite Cold Storage, Route 6, Dragonspiral Tower in Winter
89 Vanillish Dragonspiral Tower in Winter, evolve Vanillite at level 35
90 Vanilluxe Evolve Vanillish at level 47
91 Deerling Route 6, Route 7, Dragonspiral Tower
92 Sawsbuck Outside Dragonspiral Tower, evolve Deerling at level 36
93 Emolga (All rustling) - Route 5, 6, 7, 9, 10, 11, 16, Dragonspiral Tower, Lostlorn Forest, Route 7 Trade
94 Karrablast Route 6, Route 10
95 Escavalier Trade Karrablast for Shelmet
96 Foongus Route 6, Route 7, Route 10 (fake Poké Ball)
97 Amoonguss Route 10, evolve Foongus at level 39
98 Frillish Surf in Route 4, Route 17, Route 18, Driftveil City, P2 Laboratory
99 Jellicent Surf in Route 4, Route 17, Route 18, Driftveil City, P2 Laboratory, evolve Frillish at level 40
100 Alomomola Surf in Route 4, Route 17, Route 18, Driftveil City, P2 Laboratory
101 Joltik Chargestone Cave
102 Galvantula Evolve Joltik at level 36
103 Ferroseed Chargestone Cave
104 Ferrothorn Evolve Ferroseed
105 Klink Chargestone Cave, P2 Laboratory
106 Klang Evolve Klink at level 38
107 Klinklang Evolve Klang at level 49
108 Tynamo Chargestone Cave
109 Eelektrik Evolve Tynamo at level 39
110 Eelektross Evolve Eelektrik with Thunder Stone
111 Elgyem Celestial Tower (3F-5F)
112 Beheeyem Evolve Elgyem at level 42
113 Litwick Celestial Tower (all floors)
114 Lampent Evolve Litwick at level 41
115 Chandelure Evolve Lampent with Dusk Stone (Mistralton Cave, Route 10)
116 Axew Mistralton Cave
117 Fraxure Victory Road, evolve Axew at level 38
118 Haxorus Evolve Fraxure at level 48
119 Cubchoo Twist Mountain, Route 7, Dragonspiral Tower in Winter
120 Beartic Dragonspiral Tower in Winter, evolve Cubchoo at level 37
121 Cryogonal Twist Mountain
122 Shelmet Route 8, Icirrus City, Moor of Icirrus except in Winter
123 Accelgor Trade Shelmet for Karrablast
124 Stunfisk Route 8, Icirrus City
125 Mienfoo Dragonspiral Tower, Victory Road
126 Mienshao Evolve Mienfoo at level 50
127 Druddigon Dragonspiral Tower
128 Golett Dragonspiral Tower (2F)
129 Golurk Evolve Golett at level 43
130 Pawniard Route 9
131 Bisharp Evolve Pawniard at level 52
132 Bouffalant Route 10
133 Rufflet (White only) Route 10, Victory Road
134 Braviary (White only) Evolve Rufflet at level 54
135 Vullaby (Black only) Route 10, ]Victory Road
136 Mandibuzz (Black only) Evolve Vullaby at level 54
137 Heatmor Victory Road (outer)
138 Durant Victory Road
139 Deino Victory Road
140 Zweilous Evolve Deino at level 50
141 Hydreigon Evolve Zweilous
142 Larvesta Hatch egg from Pokémon Ranger in Route 18
143 Volcarona Evolve Larvesta at level 59, Relic Castle (level 70 postgame version is untiered)
144 Cobalion Guidance Chamber of Mistralton Cave
145 Terrakion Victory Road, must capture Cobalion first
146 Virizion Rumination Field of Pinwheel Forest, must capture Cobalion first
147 Tornadus (Black only) Roaming Unova after seeing it in Route 7
148 Thundurus (White only) Roaming Unova after seeing it in Route 7
149 Reshiram (Black only) N's Castle, or Dragonspiral Tower if party and PC were full in N's Castle
150 Zekrom (White only) N's Castle, or Dragonspiral Tower if party and PC were full in N's Castle
151 Landorus Abundant Shrine (untiered, must have Tornadus and Thundurus)
152 Kyurem Giant Chasm (untiered)
153 Keldeo Event (untiered)
154 Meloetta Event (untiered)
155 Genesect Event (untiered)
What tools are allowed for the player to use?
The player is allowed to use any legitimate means within the cartridge for completing the game efficiently. The player is only allowed to trade to evolve Pokemon and not to receive outside help otherwise. The player is allowed to use items such as X Items, Potions, TMs, and Berries. Keep in mind that items have opportunity costs associated with them and can still contribute to a Pokemon negatively if it requires a multitude of items. Personally, I generally don't bother with X items myself, and I can't think of any mon in Black and White that would need them.
Tier List Key
This signifies what game a Pokemon can be caught in, and whether they need a trade to evolve.
BW: Both versions
B: Black Version only
W: White Version only
(Trade) - Pokemon is ranked based off of trading for its evolution.
(No Trade) - Pokemon is ranked based off of no trade accessible to the player (this does not include in-game trades).
These following Pokemon unless otherwise noted are version exclusive:
Black (B): Gothita (Routes 16 and 5, 30%, Gothorita (Route 9, 30%), Gothitelle (Route 9, 5%, rustling grass)
Tornadus (roamer post eight badges, level 40, male)
Vullaby (Route 10, 30%) and Mandibuzz (you can catch it postgame so it is untiered catching it that way)
Reshiram: N's Castle, forced capture, 2 battles left. Yeah, F-tier because there is 2 battles left and Reshiram is only decent against N (Ghetsis laughs at it).
White (W): Solosis (Routes 16 and 5, 30%, Duosion (Route 9, 30%), Reuniclus (Route 9, 5%, rustling grass)
Thundurus (roamer post eight badges, level 40, male)
Rufflet (Route 10, 30%) and Braviary (you can catch it postgame so it is untiered catching it that way)
Zekrom: N's Castle, forced capture, 2 battles left. Yeah, F-tier because there is 2 battles left and Zekrom isn't quite as decent as Reshiram is against the last two fights (Ghetsis laughs at it).
Gothita vs. Solosis quick review: Both are mediocre IMO. Both can get Screens / Thunder Wave via TMS immediately (which is nice), while Gothita alone can learn Grass Knot. Gothita line has a pretty useless ability but less of a movepool rut than Solosis, while Solosis has the great Magic Guard but a serious lack of good moves besides Psychic STAB. Gothita's slightly higher Speed and useless ability balance out Solosis's lower speed, movepool rut, and Magic Guard, so I could see both at C-tier. If you want a Psychic, just go for Sigilyph; Munna is okay but has movepool issues and Elgyem is late and evolves late).
Tornadus vs. Thundurus: Eh. Yeah, you can Master Ball them, but it's post 8 badges, so there's not much game left, and they don't have amazing endgame matchups. You can TM Brick Break and Sludge Bomb immediately, but I don't see why these would be better than what you already have. If you want an endgame legend, I'd go for Terrakion instead, and if you want a legend in general that isn't terribly late, Cobalion is good but requires a detour (another mon I want discussion on as a lot were praising Cobalion in the old thread). Can't see Tornadus vs. Thundurus going above D-tier at best really.
Vullaby vs. Rufflet: Both suck hard, are crazy late with a dumb evo level. I've gotten Mandibuzz pre-E4. but don't use either, they suck maingame. I would say E-tier, borderline F-tier for both, though Braviary is slightly more useful.
Reshiram vs. Zekrom: See above (both are too late to do much).
Exceptions:
In Pinwheel Forest's Outer area in Black Version, Sawk would get a good nod, as it has an acceptable 10% encounter rate, while you only have a 5% chance to find its counterpart Throh in rustling grass at a 5% rate, in contrast to White where Throh is 10% in the regular and dark grass and Sawk is 5% in the rustling grass. Sawk would be ranked higher in Black but lower in White, and vice versa for Throh. As for a small review, I would say Sawk is better due to Sturdy and sweeper stats, but Throh is probably only a notch below it as while slow, its stats are superior to most other things at the time.
Cottonee (in the wild in Black) and Petilil (in the wild in White). In White, Cottonee can be obtained from trading a Petilil to Dye in the southeastern side of Nacrene City, while in Black, Petilil can be obtained from trading a Cottonee to Dye in in the same area. Regardless of version, the mon you recieve is a female at level 15 with Modest nature and 20/20/20/31/20/20 IVs. As for Abilities, Cottonee has Prankster (what it needs) while Petilil has Clorophyll (worse than Own Tempo, but you could still get by with Giga Drain/switching after Petal Dance).
As for a quick review on which one the player should pick, Petilil is better regardless if you trade or not, as Cottonee just lacks raw firepower to be good even with great IVs. Also, Cotton Guard on Cottonee is kind of overrated anyway (I've used it in Unova myself in BW2 and MAYBE BW1) since Whimsicott is ineffective against gyms past Clay, and even in the E4 you really only have Grimsley and Marshall to set up on, with the former having super effective moves and the latter having Stone Edge on all his mons save Mienshao with a super-effective U-turn. Otherwise, the only other targets you hit are Shauntal's Jellicent and Golurk. Against N and Ghetsis, both mons can only really hit Carracosta and Seismitoad super-effectively, so they are not superstars of endgame, only decent.
Trade evolutions: Gigalith (obtained by catching Roggenrola in Wellspring Cave at 50% encounter rate and evolving to Boldore level 25 or in later areas), Conkeldurr (obtained by catching Timburr in Pinwheel Forest (Outer) at 20% encounter rate and evolving to Gurdurr at level 25 or in later areas), Karrablast (Route 6, 25%, trade Karrablast for Shelmet), Shelmet (Route 8, Icirrus City, Moor of Icirrus, 40% in any season save Winter where its unavailable, trade Shelmet for Karrablast).
Other in-game trades:
Black: Trade Mincinno to Youngster Kyle in Driftveil City: Recieve Red-Striped Basculin, level 25, Sitrus Berry, male, Reckless, Adamant, 20/31/20/20/20/20 IVs.
White: Trade Mincinno to Youngster Kyle in Driftveil City: Recieve Blue-Striped Basculin, level 25, Sitrus Berry, male, Rock Head, Adamant, 20/31/20/20/20/20 IVs.
Note you can get either variant of Basculin in both games. Red-Striped are common in Black while Blue-Striped are common in White, but the opposite version is always found in the respective versions by Surfing into rippling water. Note that while the traded Basculin have good IVs and Nature, I don't recommend these trade Basculin because Adaptability is so much better (albeit gotten after Surf).
Both games: Trade Boldore for Emolga with Hiker Manny on Route 7, Emolga is male, level 30, with Lum Berry, Lax, 20/20/31/20/20/20 IVs.
Meh. You have great moves like Electro Ball and Acrobatics with Emolga at level 30, but it misses out on earlier fights compared to catching it earlier, and Joltik is available around the same time.
Current Tier List Rankings
Here is my opinion on what should be on the tiers so far (with descriptions taken from Its_A_Random's https://www.smogon.com/forums/threads/pokémon-x-y-in-game-tier-list-discussion-mkii.3517128/ thread):
S tier: Reserved for Pokémon who possess the highest levels of efficiency of the available options in the Pokémon Black & White versions. Pokémon in this tier are able to OHKO or 2HKO an overwhelming majority of opponents, limiting the amount of attacks used against them, and possess minimal reliance on items to help assist them defeat opponents at like levels. These Pokémon typically show up before the late-game and any flaws they have are absolutely made up by their advantages.
Darumaka

Drilbur

Scraggy
A tier: Reserved for Pokémon whose efficiency in terms of completing the game is considered to be very high. Pokémon in this tier are able to OHKO or 2HKO a lot of opponents and are not very reliant on items to succeed, but either have some visible flaws that hurt their efficiency or have their usefulness counterbalanced by a late arrival.

Archen

Axew

Timburr (trade)

Lillipup

Oshawott

Panpour

Petilil

Roggenrola (trade)

Sandile

Sawk

Solosis

Throh
B-Tier: Reserved for Pokémon whose efficiency in terms of completing the game is considered to be high. Pokémon in this tier are able to OHKO or 2HKO a fair chunk of opponents and may have a bit of item reliance to assist in sweeping opponents. These Pokémon are still very useful but either have several visible flaws holding them back or come fairly late.

Dwebble

Coballion

Ferroseed

Joltik

Karrablast (trade)

Litwick

Pansage

Sigilyph

Timburr (no trade)

Tepig

Tympole
C-Tier: Reserved for Pokémon whose efficiency in terms of completing the game is considered to be moderately high. Pokémon in this tier are able to OHKO or 2HKO a reasonable portion of opponents but are matchup-based enough to need some item reliance to assist in sweeping some opponents. These Pokémon are useful but either have several visible flaws holding them back or barely make up for their late arrivals.

Audino

Basculin

Blitzle

Cottonee

Deerling

Druddigon

Ducklett

Elgyem

Emolga

Gothita

Klink

Mincinno

Munna

Pansear

Sewaddle

Snivy

Tirtouga

Vanillite

Venipede
D-Tier: Reserved for Pokémon whose efficiency in terms of completing the game is considered to be average. Pokémon in this tier are able to OHKO or 2HKO a small amount of opponents and tend to be matchup-based enough to need item reliance to assist in sweeping a few opponents. The usefulness of these Pokémon are typically counterbalanced by many visible flaws or are useful Pokémon that come very late.

Bouffalant

Cubchoo

Durant

Foongus

Frillish

Golett

Purrloin

Maractus

Mienfoo

Patrat

Pidove

Roggenrola (no trade)

Shelmet (trade)

Stunfisk

Terrakion

Tynamo

Virizion

Woobat

Yamask
E-Tier: Reserved for Pokémon whose efficiency in terms of completing the game is considered to be low. Pokémon in this tier are generally only able to OHKO or 2HKO specific opponents and suffer from being matchup-based, generally relying on items to assist in sweeping several opponents. These Pokémon either have flaws that outshine its strengths or are otherwise decent Pokémon that come too late to be of any major use.

Alomomola

Cryogonal

Deino

Heatmor

Karrablast (no trade)

Larvesta

Pawniard

Rufflet

Shelmet (no trade)

Thundurus

Tornadus

Trubbish

Vullaby
Untiered: These Pokemon can't be obtained in-game without use of events or come postgame and thus can't be tiered. The exceptions are Reshiram and Zekrom, who are barely in-time for the end of the game.

Genesect

Keldeo

Kyurem

Landorus

Meloetta

Reshiram

Victini

Zekrom

Zoroark

Zorua
As for the first discussion slate, what is everyone's thoughts on Munna, Sewaddle, Timburr (both with and without trade) and Coballion? Note that if you have other thoughts, even about the top tiers, feel free to post them; it still promotes discussion even though they aren't the main focus.
Thanks for reading, and happy posting!
Also we do not drop things ever.
We do not drop things ever.
We do not drop things ever.
If you are going to use something, use it the whole game, no exceptions.
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