Hello guys! I'm Sphinxx and here with my 4th RMT. This team as stated from the title is based around a FWG (Fire-Water-Grass) core with Mega-Gyarados as the main pokemon. IMO, MGyarados is a very underrated mon and underused in OU. With the proper team composition and play ingame, it can become a real monster as most teams are unprepared for MGyarados due to its relatively low popularity in the OU tier.
The team is currently 1500+ in PS after only a week of playing and I have decided to make it my main team and am currently aiming to reach 1700-1800 ELO in PS. But as I have tweaked the team, I have already hit limbo at 1500-1600, not being able to break the 1700 ELO barrier, so I am posting my team in order to garner suggestions as well as to share it with others as laddering from 1000-1400 was a breeze while using the team.
Before I move on to the teambuilding process, replays, and team member discussions, I'd like to give my thanks and shoutouts to
RedzoneX and kamikaz 100
whom I met in the PS OU chatroom, for the initial advice and suggestions for the team composition. Thanks guys!
The team is currently 1500+ in PS after only a week of playing and I have decided to make it my main team and am currently aiming to reach 1700-1800 ELO in PS. But as I have tweaked the team, I have already hit limbo at 1500-1600, not being able to break the 1700 ELO barrier, so I am posting my team in order to garner suggestions as well as to share it with others as laddering from 1000-1400 was a breeze while using the team.
Before I move on to the teambuilding process, replays, and team member discussions, I'd like to give my thanks and shoutouts to
RedzoneX and kamikaz 100
whom I met in the PS OU chatroom, for the initial advice and suggestions for the team composition. Thanks guys!
Mega Gyarados Offense (FWG CORE)
Team Building/Team Members Discussions

Krakken / Mega Gyarados
EVs: 72 HP / 252 Atk / 184 Spe
Ability: Moxie
Jolly Nature
Dragon Dance
Waterfall
Crunch
Earthquake
The star of the show, Mega Gyarados is a very underrated and underused Mega Pokemon in the OU tier. Thanks to its great offensive typing and access to coverage, it is a very formidable sweeping pokemon after its checks are weakened. The EV spread ensure maximum attack stat, being able to outspeed non-scarf Ash-Gren and Koko after 1 DD, also being able to 2HKO any variant of Toxapex unboosted. The rest is put in bulk in order to tank more chip damage from water shurikens. The only notable consideration for max speed investment is for Mega Beedrill but it's not really common. Moxie is taken over intimidate since we have a Lando on the team and the team WILL struggle against Bisharp if it can toggle defiant on two of the mons. Also, the additional attack boost before mega-evolving is useful for breaking fatter teams using minimum number of boosts. Bar bisharp tho, intimidate can be taken over moxie. Waterfall and Crunch are obligatory stab moves, both hitting hard due to MGyara's high attack stat. Ice Fang was taken initially as the last move but Earthquake was found out to be a lot more effective in hitting Electric pokemon and Pex which are very common in the tier. Dragon Dance is our bread and butter boosting skill, allowing MGyarados to be beastly late in the game.
- 252 Atk Mold Breaker Gyarados-Mega Earthquake vs. 0 HP / 0 Def Tapu Koko: 284-336 (101 - 119.5%) -- guaranteed OHKO
- +1 252 Atk Mold Breaker Gyarados-Mega Earthquake vs. 252 HP / 192+ Def Toxapex: 206-244 (67.7 - 80.2%) -- guaranteed 2HKO
- +1 252 Atk Mold Breaker Gyarados-Mega Waterfall vs. 248 HP / 252+ Def Eviolite Chansey: 297-349 (42.2 - 49.6%) -- 89.1% chance to 2HKO after Stealth Rock
- 252 Atk Mold Breaker Gyarados-Mega Waterfall vs. 252 HP / 216+ Def Landorus-Therian: 236-282 (61.7 - 73.8%) -- guaranteed 2HKO after Leftovers recovery
- +1 252 Atk Mold Breaker Gyarados-Mega Crunch vs. 252 HP / 28 Def Tangrowth: 180-213 (44.5 - 52.7%) -- guaranteed 2HKO after Stealth Rock
- +1 252 Atk Mold Breaker Gyarados-Mega Earthquake vs. 252 HP / 192+ Def Toxapex: 206-244 (67.7 - 80.2%) -- guaranteed 2HKO
- +1 252 Atk Mold Breaker Gyarados-Mega Waterfall vs. 248 HP / 252+ Def Eviolite Chansey: 297-349 (42.2 - 49.6%) -- 89.1% chance to 2HKO after Stealth Rock
- 252 Atk Mold Breaker Gyarados-Mega Waterfall vs. 252 HP / 216+ Def Landorus-Therian: 236-282 (61.7 - 73.8%) -- guaranteed 2HKO after Leftovers recovery
- +1 252 Atk Mold Breaker Gyarados-Mega Crunch vs. 252 HP / 28 Def Tangrowth: 180-213 (44.5 - 52.7%) -- guaranteed 2HKO after Stealth Rock

Sasquatch / Tangrowth
@ Assault Vest
Ability: Regenerator
EVs: 252 HP / 4 Def / 252 SpD
Sassy Nature
Hidden Power Ice
Knock Off
Giga Drain
Earthquake
Tangrowth is the second member of the FWG core with Mega Gyarados. With Maximum HP and SpDef EVs, it can tank a plethora of special threats in the tier. especially Greninjas. Regenerator allows multiple switchins, being able to scout for moves as well as pivoting in and out of battle whilst regenerating health. Sassy nature provides no kick on any other stat, maximizing defensive and offensive output for speed. HP Ice hits non-z Zygarde, Chomp, and non fly-z Lando-T after Tang switches in on them. Knock Off is a must in the meta, crippling Chansey, Choice-item mons, and lefties fatmons on switch. Giga Drain is for the grass stab on the team. Equake ensures heatran doesn't come in for free on this guy. Sasquatch acts as a move scout and mixed wall (def is good even with juts 4 EVs), and is switched into Lele and Gren. It also relieves leech seed pressure from the likes of Steela and Ferro, knocking off their lefties before switching out.
- 252 SpA Choice Specs Greninja-Ash Ice Beam vs. 252 HP / 252+ SpD Assault Vest Tangrowth: 240-284 (59.4 - 70.2%) -- guaranteed 2HKO
- 0 SpA Heatran Lava Plume vs. 252 HP / 252+ SpD Assault Vest Tangrowth: 156-186 (38.6 - 46%) -- guaranteed 3HKO
- 252 SpA Keldeo Secret Sword vs. 252 HP / 4 Def Tangrowth: 114-135 (28.2 - 33.4%) -- 0% chance to 3HKO
- 252 SpA Life Orb Teravolt Kyurem-Black Ice Beam vs. 252 HP / 252+ SpD Assault Vest Tangrowth: 265-312 (65.5 - 77.2%) -- guaranteed 2HKO
- 252 SpA Tapu Lele Psychic vs. 252 HP / 252+ SpD Assault Vest Tangrowth in Psychic Terrain: 160-189 (39.6 - 46.7%) -- guaranteed 3HKO
- 0 SpA Heatran Lava Plume vs. 252 HP / 252+ SpD Assault Vest Tangrowth: 156-186 (38.6 - 46%) -- guaranteed 3HKO
- 252 SpA Keldeo Secret Sword vs. 252 HP / 4 Def Tangrowth: 114-135 (28.2 - 33.4%) -- 0% chance to 3HKO
- 252 SpA Life Orb Teravolt Kyurem-Black Ice Beam vs. 252 HP / 252+ SpD Assault Vest Tangrowth: 265-312 (65.5 - 77.2%) -- guaranteed 2HKO
- 252 SpA Tapu Lele Psychic vs. 252 HP / 252+ SpD Assault Vest Tangrowth in Psychic Terrain: 160-189 (39.6 - 46.7%) -- guaranteed 3HKO

Lava Monster / Heatran
@ Leftovers
Ability: Flash Fire
EVs: 248 HP / 8 Def / 252 SpD
Calm Nature
IVs: 0 Atk
Earth Power
Stealth Rock
Toxic
Lava Plume
The Lava Monster is the last member of the FWG core and is specially defensive in order to take hits from Flying and Fairy types better for the other 2 (Krakken and Sasquatch). Heatran checks most of the threats that hinder Gyara's sweep including Steela, Zam (can switchin once on Focus Miss), and serves as soft checks to offensive flying types. 248 HP EVs provides the odd number hp, rest is put in Defense EVs. Max SpDef allows it to live 1 earth power from timid max SpA Heatran and 0HKOing it back with EPower. Lava Plume is fire stab(Magma Storm is not opted as this is not a trapping set). Stealth Rock is a must on every team and is placed on tran, which finds free rocks on many pokemon such as the prevalent steel types nowadays. Toxic is preferred over protect and taunt in order to cripple switchins like Keldeo, Gren, and Kyurem Black if ever Heatran is in first.
- 252 SpA Tapu Lele Focus Blast vs. 248 HP / 252+ SpD Heatran: 180-214 (46.7 - 55.5%) -- 14.8% chance to 2HKO after Leftovers recovery
- 252 SpA Heatran Earth Power vs. 248 HP / 252+ SpD Heatran: 272-324 (70.6 - 84.1%) -- guaranteed 2HKO after Leftovers recovery
- 0 SpA Heatran Earth Power vs. 0 HP / 4 SpD Heatran: 308-364 (95.3 - 112.6%) -- 68.8% chance to OHKO
- 0 SpA Pelipper Scald vs. 248 HP / 252+ SpD Heatran in Rain: 174-206 (45.1 - 53.5%) -- 1.2% chance to 2HKO after Leftovers recovery
- 252 SpA Heatran Earth Power vs. 248 HP / 252+ SpD Heatran: 272-324 (70.6 - 84.1%) -- guaranteed 2HKO after Leftovers recovery
- 0 SpA Heatran Earth Power vs. 0 HP / 4 SpD Heatran: 308-364 (95.3 - 112.6%) -- 68.8% chance to OHKO
- 0 SpA Pelipper Scald vs. 248 HP / 252+ SpD Heatran in Rain: 174-206 (45.1 - 53.5%) -- 1.2% chance to 2HKO after Leftovers recovery

Cerberus-2 / Landorus-T
@ Flyinium Z
Ability: Intimidate
EVs: 252 Atk / 4 SpD / 252 Spe
Adamant Nature
Swords Dance
Rock Polish
Fly
Earthquake
The king of OU, the set utilized in this team is the double dance set. Double Dance Fly-Z often catches people offguard and results to sweeps. The Intimidate ability is useful for switching into physical mons, lowering their attack stat. Adamant nature ensures 0HKOs on specific mons like other Lando T after an SD and 0HKOing Pex also after an SD. 4 in SpD to better the shuriken matchup. FlyZ hits MVenu, Hawlucha, and Fat Grasses, which this team would struggle with otherwise. Earthquake is obligatory stab and hits like a truck with the adamant nature. The thing with DD lando is that no one expects it. Usually it comes in on a mon, opposing Lando T comes in on an SD Fly-Z. It also revenge kills MPinsir when it comes in from full, or flies on MPinsir's SD and 0HKOs it next turn. Soft checks stuff like slow Magearna's, Alowak, Zard X and Zygarde to some extent.
- 252+ Atk Landorus-Therian Supersonic Skystrike (175 BP) vs. 252 HP / 216+ Def Landorus-Therian: 271-319 (70.9 - 83.5%) -- guaranteed 2HKO after Stealth Rock and Leftovers recovery
- +2 252+ Atk Landorus-Therian Earthquake vs. 252 HP / 192+ Def Toxapex: 432-510 (142.1 - 167.7%) -- guaranteed OHKO
- 252+ Atk Landorus-Therian Fly vs. 0 HP / 4 Def Pinsir-Mega: 300-354 (110.7 - 130.6%) -- guaranteed OHKO
- -1 252 Atk Aerilate Pinsir-Mega Return vs. 0 HP / 0 Def Landorus-Therian: 166-196 (52 - 61.4%) -- guaranteed 2HKO
- +2 252+ Atk Landorus-Therian Supersonic Skystrike (175 BP) vs. 252 HP / 132+ Def Celesteela: 265-312 (66.5 - 78.3%) -- guaranteed 2HKO after Leftovers recovery
- +2 252+ Atk Landorus-Therian Earthquake vs. 252 HP / 192+ Def Toxapex: 432-510 (142.1 - 167.7%) -- guaranteed OHKO
- 252+ Atk Landorus-Therian Fly vs. 0 HP / 4 Def Pinsir-Mega: 300-354 (110.7 - 130.6%) -- guaranteed OHKO
- -1 252 Atk Aerilate Pinsir-Mega Return vs. 0 HP / 0 Def Landorus-Therian: 166-196 (52 - 61.4%) -- guaranteed 2HKO
- +2 252+ Atk Landorus-Therian Supersonic Skystrike (175 BP) vs. 252 HP / 132+ Def Celesteela: 265-312 (66.5 - 78.3%) -- guaranteed 2HKO after Leftovers recovery

Icarus / Zapdos
@ Leftovers
Ability: Pressure
EVs: 248 HP / 44 Def / 216 Spe
Timid Nature
IVs: 0 Atk
Defog
Thunderbolt
Hidden Power Ice
Roost
The designated defogger, fast bulky Zapdos is the choice mon. 248 HP EVs ensure odd numbered max bulk while the speed nature and EVs allow Icarus to outspeed 309 speed mons like fast Lando T. The rest is put in defense in order to take hits from MPinsir and non-ice punch MegaCham better. Tbolt is stab, HP Ice hits LandoT, Zygarde hard (Ferro is walled completely by heatran so heatwave maybe opted if Ferro becomes a problem too much). Defog is a must since I'd auto lose to hazard stack. Roost for reliable recovery outside of the leftovers. Pressure as an ability strengthens the stall matchup. An alternate set is to use rocky helmet with Static ability for that 30% Paralyze meme.

Ninja Master / Greninja
@ Choice Scarf
Ability: Protean
EVs: 252 Atk / 4 SpA / 252 Spe
Hasty Nature
Ice Beam
U-turn
Low Kick
Rock Slide
The Ninja Master himself, scarf physical Protean Gren is the most common lead of the team and this unorthodox set usually catches people offguard. Max attack and 4 SpA EVs make for an all-out attacking Gren, scoring 0HKOs on Ice Beam weak mons while keeping its physical cleaning potential intact with max attack EVs. U-turn is for momentum and 0HKOs slower gren. Gren does not die to non-max Attack gren. Low kick is a good fighting stab, which is surprisingly useful for some situations especiall when that Chansey thinks he can just soft boil on you. Rock slide 0HKOs all Volc variants (even max hp max def) and MPinsir. Gren is the lead pokemon scouting for sets and momentum with u-turn/ice beam. Scarfgren outspeeds most mon bar scarf Koko.
- 4 SpA Protean Greninja Ice Beam vs. 252 HP / 24 SpD Landorus-Therian: 468-552 (122.5 - 144.5%) -- guaranteed OHKO
- 4 SpA Protean Greninja Ice Beam vs. 0 HP / 0 SpD Tapu Bulu: 210-248 (74.7 - 88.2%) -- guaranteed 2HKO after Grassy Terrain recovery
- 252 Atk Protean Greninja U-turn vs. 0 HP / 0 Def Greninja: 254-302 (89.1 - 105.9%) -- 31.3% chance to OHKO
- 4 Atk Protean Greninja U-turn vs. 0 HP / 0- Def Greninja: 224-266 (78.5 - 93.3%) -- guaranteed 2HKO
- 252 Atk Protean Greninja Low Kick (60 BP) vs. 248 HP / 252+ Def Eviolite Chansey: 210-248 (29.8 - 35.2%) -- 21% chance to 3HKO
- 252 Atk Protean Greninja Low Kick (100 BP) vs. 140 HP / 0 Def Magnezone: 236-278 (74.6 - 87.9%) -- guaranteed 2HKO
- 252 Atk Protean Greninja Rock Slide vs. 248 HP / 252+ Def Volcarona: 372-444 (99.7 - 119%) -- 93.8% chance to OHKO
- 252 Atk Protean Greninja Low Kick (120 BP) vs. 0 HP / 0 Def Kyurem-Black: 318-374 (81.3 - 95.6%) -- guaranteed 2HKO
- 4 SpA Protean Greninja Ice Beam vs. 0 HP / 0 SpD Tapu Bulu: 210-248 (74.7 - 88.2%) -- guaranteed 2HKO after Grassy Terrain recovery
- 252 Atk Protean Greninja U-turn vs. 0 HP / 0 Def Greninja: 254-302 (89.1 - 105.9%) -- 31.3% chance to OHKO
- 4 Atk Protean Greninja U-turn vs. 0 HP / 0- Def Greninja: 224-266 (78.5 - 93.3%) -- guaranteed 2HKO
- 252 Atk Protean Greninja Low Kick (60 BP) vs. 248 HP / 252+ Def Eviolite Chansey: 210-248 (29.8 - 35.2%) -- 21% chance to 3HKO
- 252 Atk Protean Greninja Low Kick (100 BP) vs. 140 HP / 0 Def Magnezone: 236-278 (74.6 - 87.9%) -- guaranteed 2HKO
- 252 Atk Protean Greninja Rock Slide vs. 248 HP / 252+ Def Volcarona: 372-444 (99.7 - 119%) -- 93.8% chance to OHKO
- 252 Atk Protean Greninja Low Kick (120 BP) vs. 0 HP / 0 Def Kyurem-Black: 318-374 (81.3 - 95.6%) -- guaranteed 2HKO
1. Kyurem-B
Counterplay is to catch it off with low kick gren after it hopefully gets damage. Otherwise it's a sacking game if MGyara can't setup.
2. Jolly Mega Medicham
Beastly and is a huge threat to my team. My team's lack of psychic coverage makes it hard to revenge kill if it has Ice punch.
3. Scarf Koko
Hard to predict as some koko users feign scarf. I have no way to outspeed it, Tang is heavily pressured.
4. Trick room
No taunt means free trickrooms. Good thing Tang can check TR Magearna.
Counterplay is to catch it off with low kick gren after it hopefully gets damage. Otherwise it's a sacking game if MGyara can't setup.
2. Jolly Mega Medicham
Beastly and is a huge threat to my team. My team's lack of psychic coverage makes it hard to revenge kill if it has Ice punch.
3. Scarf Koko
Hard to predict as some koko users feign scarf. I have no way to outspeed it, Tang is heavily pressured.
4. Trick room
No taunt means free trickrooms. Good thing Tang can check TR Magearna.
This was my team. I am entertaining suggestions and comments. Will be updating the ladder rating if it improves. Thank you for reading!