Wishiwashi have a new Ability, Schooling, which no Pokémon has previously had. Under certain conditions, Wishiwashi will change in battle to their School Form. A single Wishiwashi is tiny and weak. Measuring just eight inches from nose to tail, Wishiwashi is very small, even for a Pokémon. Yet the people of the Alola region seem to view it as a terrifying Pokémon. When it’s in danger, Wishiwashi’s glistening eyes catch the light and shine out, sending a distress signal to its allies.
School Form
The seemingly weak Wishiwashi is called the demon of the sea because of its ferocious School Form. When Wishiwashi receive a distress signal, they unite in a huge battle formation.