Pikachu

Pikachu is an electrical, yellow mouse and a Pokémon who is the mascot of the Pokémon franchise. It is recognizable by its lightning bolt-shaped tail and red cheeks that store electricity. Ash Ketchum of the Pokémon anime series owns his own Pikachu, who is the most notable Pikachu within the Pokémon franchise. In the core games, Pikachu evolves into Raichu if a Thunder Stone is used on it. Since Pokémon Gold and Silver Versions, Pikachu has a pre-evolved form named Pichu, which evolves if its friendship with its trainer is high enough.