Wishiwashi @ Choice Band
Ability: Schooling
EVs: 252 HP / 252 Atk / 4 SpD
Brave Nature
IVs: 0 Spe
- Liquidation
- Earthquake
- Flip Turn
- Toxic
you could try this as like a trick room breaker. You might need wishpass support though, as like mentioned, its not good after becoming smol fish
Wishiwashi @ Leftovers
Ability: Schooling
EVs: 252 HP / 252 Def / 4 SpD
Bold Nature
IVs: 0 Atk
- Whirlpool
- Protect
- Toxic
- Scald
Trapper, protect for stall moves and lefties recovery
Wishiwashi @ Chesto Berry
Ability: Schooling
- Rest
- Liquidation
- Earthquake
- Flip Turn
rest for recovering back to school form.
Wishiwashi @ Assault Vest/ Choice Specs
Ability: Schooling
EVs: 252 HP / 4 Atk / 252 SpA
Quiet Nature
- Scald
- Hydro Pump
- Ice Beam
- Flip Turn
AV/specs
Wishiwashi @ Figy Berry
Ability: Schooling
EVs: 252 HP / 4 Atk / 252 SpA
Quiet Nature
- Flip Turn
- Hydro Pump
- Ice Beam
- Earthquake
Pinch berry to keep it out of smol form one time, as after dropping to 1/4, it eats the berry rather than reverting to smol fish.
Basically all the sets that could possibly work that I could think of
but again, its not very good in general, and probably not worth raising one for the battle tower
also it has a different role as jellicent, as jellicent is more bulky, but I think its still worse