Pikachu is an electric-type Pokémon that serves as the mascot of the entire Pokémon series. Designated as Pokémon #025, They evolve from Pichu when leveled up with high friendship and evolve into Raichu when exposed to a Thunder Stone. Pikachu can be found in multiple Pokémon games, and is also the only starter Pokémon for the player in Pokémon Yellow.

Ash Ketchum, the main protagonist of the Pokémon anime, owns a Pikachu. In addition, a Pikachu also makes an appearance in the Super Smash Bros. series, as an reoccurring playable character.