Pokemon Pikachu #1 Pikachu (Japanese: ピカチュウ Pikachu) is an Electric-type Pokémon introduced in Generation I. It evolves from Pichu when leveled up with high friendship and evolves into Raichu when exposed to a Thunder Stone. In Alola, Pikachu will evolve into Alolan Raichu when exposed to a Thunder Stone. Pikachu has a Gigantamax form.