Already did the mandatory searches and what not, and found nothing on this combo. So, unless I derped and missed something horribly, there isn't another thread on it.
So! Stored Power. A rather overlooked move of this generation. Only finding home on a extremely small handful of pokemon, it finds use only as a gimmick. Before we go further, let us break it down.
Stored Power
Type: Psychic
Category: Special
PP 10 (16 max)
Power: 20
Accuracy: 100%
Doesn't make contact
Affected by Protect/etc
Not affected by Magic Coat
Not affected by Snatch
Affected by King's Rock
Pokemon that can learn Stored Power:
Via level up
/
/
/
Via Breeding
As is, this move is utter rubbish. 20 power with 16 PP? However, it has a special effect (Thanks Bulbpedia)
"Stored Power deals variable damage depending on the stat modifications of the user. When the user has no stat modifications, Stored Power's base power is 20. Its power increases by 20 for each stat boost the user has, and does not decrease in power due to stat drops below 0. It reaches a maximum power of 860 [20 (base power) + {20 x 7 (total number of stats that can be maximized, including Evasion and Accuracy) x 6 (maximum number of boosts per stat)}]."
Or, in other words, for every stat stage a pokemon has, its power increases by 20. So if I used Defense Curl, its power would be 40 (20 + (20 * 1)). If I used Calm Mind afterwards, its power would be 80 (20 + (20 * 3)). You can see where I am going with this.
Normally, this move is kind of underpowered. Most stat boosts give 2 at most, and the elusive quiver dance only gives 3, but the pokemon that can baton pass it are elusive at best.
Enter: Shell Smash
Type: Normal
Category: Status
"Shell Smash decreases the user's Defense and Special Defense stat by one level, but increases the user's Attack, Special Attack, and Speed by two levels each."
This move gives six stat boosts (four of which help us immensely). Ergo, Stored Power becomes a 160 (20 + (20 * 6)) 100% accurate STAB with 16 PP, which is enough to sweep an entire team, unless they all have protect and sturdy/focus sash.
Of course, none of the pokemon I listed actually have shell smash. That is where Baton Pass comes in.
Ladies and gentlemen, I give you Gorebyss. A popular canidate for "ShellSmashing," which is the act of baton passing a Gorebyss equipped with white herb after they use shell smash once to obtain a sweeper with hyperstats, it has only two common counters in today's metagame: The rare lead who has a thunder attack, and people who instantly use Taunt as their first move.
Of course, the tricky part here is making sure the poke being Baton Passed to can survive a hit to the face. For this reason, I recommend someone with special bulk, as thunder-fang and the like are not very common. Gardevoir and Victini work very well with stored power as a result. Xatu and Espeon have horrible bulk, but they have the amazing advantage of Magic Bounce, which deflects pretty much anything that doesn't do damage. I shouldn't have to tell you how amazing of a upside that is.
So, we know the strengths of this, so how about the weaknesses? For one, if your opponent leads with Intimidate, Gorebyss will eat his/her white herb like a moron, meaning that your sweeper will have to deal with 0.67x def/spdef. A huge disadvantage, since they will have to tank the swap-in hit odds are, but nothing unmanagable. Secondly, anyone who realizes what you are doing in the first turn (not a strech, since pretty much all Gorebyss does is Shell Smash/Baton Pass), who leads with Taunt, can ruin the sweep before it gets started. Shadow Sneak wrecks almost every pokemon who can learn Stored Power, and it has priority. Anything that can OHKO Gorebyss will also be problomatic. Finally, dark types as a whole are going to give you a headache.
Most of these problems can be dealt with ahead of time in WiFi by saving Gorebyss' shellsmash/batonpass until you get a opening to do so. The only real issue you will always have to keep in mind is shadow sneak, but thankfully a good chunk of pokemon who learn stored power can take at least one of them to the face. Make sure you go Timid nature and full speed EVs while we're on the subject of speed, so things like Focus Sash ShellSmash Cloyster and pokemon with Rock Polish/Agility can't outspeed you and counter-sweep you. Also, if your poke isn't terribly bulky, priority moves are going to be a real pain, since not a single pokemon who learns stored power can also learn a special type prirority move.
On a final closing note, let us go over the pros/cons of every pokemon who can learn Stored Power
Pros: It's Clefable! Make your opponent rage with memeories of hours spent trying to catch a clefairy!
Only one weakness
Immune to Shadow Sneak!
Metronome is amusing if you’re insane enough to use it
Magic Guard!
Overall a strong movepool
Cons: Rubbish base stats
It’s Clefable, you lose ten manliness points for using it
Pros: Future Sight can win you the lottery
Impressive move pool
Decent speed and spatk
Magic Bounce!
Cons: Horrible typing
Horrible defenses
Opponent may taunt you by singing Surfin’ Bird
Pros: Easy on the eyes
Above-average special bulk
Dat SpAtk
Decent speed, timid nature can outrun pretty much every other 2 speed stage booster
Trace is delicious
An utterly amazing movepool
Cons: Mono-psychic is horrible defensive wise
Trace can backfire horribly
Shadow sneak is going to ruin your day
Most priorities are physical, and Gardevoir’s physical defense is rubbish
Opponent may taunt you by posting rule 34 pics, unless you’re into it, in which case this is a pro
Pros: Baton arms!
Decent speed
High physical attack
Cons: RUBBISH Sp Atk stat
Steadfast is useless, and Justified assumes he can actually survive a dark attack
Don’t use Gallede. Just…don’t. Not with stored power at least.
Pros: ITS SOOO CUUUUTE
Base 100 stats
Accuracy boosting ability makes Focus Miss…less so
Cons: HORRIBLE typing. You thought Xatu had bad typing?
V-create is a dual-edged suicide button that really isn’t much better then stored power
Event pokemon, might be a PITA to get one
It’s cute, so minus manliness points
Pros: A hippie’s favorite pokemon
Bulky
High special attack
Good move pool
Cons: You may be accused of being a stoner
Slower than a fat man swimming in the Atlantic ocean without water wings
Somewhat crippling weaknesses
Nothing really decent in the way of abilities. Synchronize is…meh at best, Forewarn is a gimmick, and Telepathy has use in doubles and triples, but not singles
Pros: Put a Umbreon on your team too and you can pretend you’re playing Pokemon Coliseum!
Woah-jeez high special attack
High speed
Decent special defense
Magic bounce!
Cons: It will not survive any physical priority moves. Period.
Typing issues
Gary Oak uses eevee-family pokemon, and Gary Oak is a tosser
Pros: Pretty much Gardevoir with flying/normal typing
Immune to shadow sneak
It lays delicious eggs
Cons: Pretty much Gardevoir with flying/normal typing
Doesn’t get Psychic STAB
It looks like an egg with wings
No, just no. Every other monopsychic on this list is superior to either of these rejects
Pros: Unaware is kind of nice?
High speed
Awww, it has a heart nose
Cons: Rubbish stats besides speed
Crippling weaknesses
It’s the goddamn zubat of this generation
Note: Simple doesn’t synergize with this strategy because it does not work retroactively in generation 5
Pros: Magic Guard!
Average stats
Cons: What the hell is it supposed to be? Some sort of totem…pole…unown..hybrid..bird..thing?
Horrible typing again
Average stats
So yeah, that was a look at the Shell Smash/Stored Power combo, and the pokemon that can (ab)use it. Hopefully, this convinces you that it’s worth a short. Discuss?
So! Stored Power. A rather overlooked move of this generation. Only finding home on a extremely small handful of pokemon, it finds use only as a gimmick. Before we go further, let us break it down.
Stored Power
Type: Psychic
Category: Special
PP 10 (16 max)
Power: 20
Accuracy: 100%
Doesn't make contact
Affected by Protect/etc
Not affected by Magic Coat
Not affected by Snatch
Affected by King's Rock
Pokemon that can learn Stored Power:
Via level up









Via Breeding







As is, this move is utter rubbish. 20 power with 16 PP? However, it has a special effect (Thanks Bulbpedia)
"Stored Power deals variable damage depending on the stat modifications of the user. When the user has no stat modifications, Stored Power's base power is 20. Its power increases by 20 for each stat boost the user has, and does not decrease in power due to stat drops below 0. It reaches a maximum power of 860 [20 (base power) + {20 x 7 (total number of stats that can be maximized, including Evasion and Accuracy) x 6 (maximum number of boosts per stat)}]."
Or, in other words, for every stat stage a pokemon has, its power increases by 20. So if I used Defense Curl, its power would be 40 (20 + (20 * 1)). If I used Calm Mind afterwards, its power would be 80 (20 + (20 * 3)). You can see where I am going with this.
Normally, this move is kind of underpowered. Most stat boosts give 2 at most, and the elusive quiver dance only gives 3, but the pokemon that can baton pass it are elusive at best.
Enter: Shell Smash
Type: Normal
Category: Status
"Shell Smash decreases the user's Defense and Special Defense stat by one level, but increases the user's Attack, Special Attack, and Speed by two levels each."
This move gives six stat boosts (four of which help us immensely). Ergo, Stored Power becomes a 160 (20 + (20 * 6)) 100% accurate STAB with 16 PP, which is enough to sweep an entire team, unless they all have protect and sturdy/focus sash.
Of course, none of the pokemon I listed actually have shell smash. That is where Baton Pass comes in.

Ladies and gentlemen, I give you Gorebyss. A popular canidate for "ShellSmashing," which is the act of baton passing a Gorebyss equipped with white herb after they use shell smash once to obtain a sweeper with hyperstats, it has only two common counters in today's metagame: The rare lead who has a thunder attack, and people who instantly use Taunt as their first move.
Of course, the tricky part here is making sure the poke being Baton Passed to can survive a hit to the face. For this reason, I recommend someone with special bulk, as thunder-fang and the like are not very common. Gardevoir and Victini work very well with stored power as a result. Xatu and Espeon have horrible bulk, but they have the amazing advantage of Magic Bounce, which deflects pretty much anything that doesn't do damage. I shouldn't have to tell you how amazing of a upside that is.
So, we know the strengths of this, so how about the weaknesses? For one, if your opponent leads with Intimidate, Gorebyss will eat his/her white herb like a moron, meaning that your sweeper will have to deal with 0.67x def/spdef. A huge disadvantage, since they will have to tank the swap-in hit odds are, but nothing unmanagable. Secondly, anyone who realizes what you are doing in the first turn (not a strech, since pretty much all Gorebyss does is Shell Smash/Baton Pass), who leads with Taunt, can ruin the sweep before it gets started. Shadow Sneak wrecks almost every pokemon who can learn Stored Power, and it has priority. Anything that can OHKO Gorebyss will also be problomatic. Finally, dark types as a whole are going to give you a headache.
Most of these problems can be dealt with ahead of time in WiFi by saving Gorebyss' shellsmash/batonpass until you get a opening to do so. The only real issue you will always have to keep in mind is shadow sneak, but thankfully a good chunk of pokemon who learn stored power can take at least one of them to the face. Make sure you go Timid nature and full speed EVs while we're on the subject of speed, so things like Focus Sash ShellSmash Cloyster and pokemon with Rock Polish/Agility can't outspeed you and counter-sweep you. Also, if your poke isn't terribly bulky, priority moves are going to be a real pain, since not a single pokemon who learns stored power can also learn a special type prirority move.
On a final closing note, let us go over the pros/cons of every pokemon who can learn Stored Power

Pros: It's Clefable! Make your opponent rage with memeories of hours spent trying to catch a clefairy!
Only one weakness
Immune to Shadow Sneak!
Metronome is amusing if you’re insane enough to use it
Magic Guard!
Overall a strong movepool
Cons: Rubbish base stats
It’s Clefable, you lose ten manliness points for using it

Pros: Future Sight can win you the lottery
Impressive move pool
Decent speed and spatk
Magic Bounce!
Cons: Horrible typing
Horrible defenses
Opponent may taunt you by singing Surfin’ Bird

Pros: Easy on the eyes
Above-average special bulk
Dat SpAtk
Decent speed, timid nature can outrun pretty much every other 2 speed stage booster
Trace is delicious
An utterly amazing movepool
Cons: Mono-psychic is horrible defensive wise
Trace can backfire horribly
Shadow sneak is going to ruin your day
Most priorities are physical, and Gardevoir’s physical defense is rubbish
Opponent may taunt you by posting rule 34 pics, unless you’re into it, in which case this is a pro

Pros: Baton arms!
Decent speed
High physical attack
Cons: RUBBISH Sp Atk stat
Steadfast is useless, and Justified assumes he can actually survive a dark attack
Don’t use Gallede. Just…don’t. Not with stored power at least.

Pros: ITS SOOO CUUUUTE
Base 100 stats
Accuracy boosting ability makes Focus Miss…less so
Cons: HORRIBLE typing. You thought Xatu had bad typing?
V-create is a dual-edged suicide button that really isn’t much better then stored power
Event pokemon, might be a PITA to get one
It’s cute, so minus manliness points

Pros: A hippie’s favorite pokemon
Bulky
High special attack
Good move pool
Cons: You may be accused of being a stoner
Slower than a fat man swimming in the Atlantic ocean without water wings
Somewhat crippling weaknesses
Nothing really decent in the way of abilities. Synchronize is…meh at best, Forewarn is a gimmick, and Telepathy has use in doubles and triples, but not singles

Pros: Put a Umbreon on your team too and you can pretend you’re playing Pokemon Coliseum!
Woah-jeez high special attack
High speed
Decent special defense
Magic bounce!
Cons: It will not survive any physical priority moves. Period.
Typing issues
Gary Oak uses eevee-family pokemon, and Gary Oak is a tosser

Pros: Pretty much Gardevoir with flying/normal typing
Immune to shadow sneak
It lays delicious eggs
Cons: Pretty much Gardevoir with flying/normal typing
Doesn’t get Psychic STAB
It looks like an egg with wings


No, just no. Every other monopsychic on this list is superior to either of these rejects

Pros: Unaware is kind of nice?
High speed
Awww, it has a heart nose
Cons: Rubbish stats besides speed
Crippling weaknesses
It’s the goddamn zubat of this generation
Note: Simple doesn’t synergize with this strategy because it does not work retroactively in generation 5

Pros: Magic Guard!
Average stats
Cons: What the hell is it supposed to be? Some sort of totem…pole…unown..hybrid..bird..thing?
Horrible typing again
Average stats
So yeah, that was a look at the Shell Smash/Stored Power combo, and the pokemon that can (ab)use it. Hopefully, this convinces you that it’s worth a short. Discuss?