Schooling

Generation VII · 1 species

Wishiwashi becomes Schooling Form when its HP is 25% or higher.

In detail

If this Pokémon is a Wishiwashi and level 20 or above, then when it enters battle and at the start of each turn, it becomes Schooling Form if its HP is 25% or higher and Solo Form otherwise. This ability cannot be replaced, copied, or nullified.

In-game description
When it has a lot of HP, the Pokémon forms a powerful school. It stops schooling when its HP is low.

Pokémon with Schooling

1 species

Wishiwashi