Pikachu (ピカチュウ, Pikachuu) is an Electric-type Pokémon which was introduced in Generation I. Pikachu is renowned for being the most well-known and recognizable Pokémon. Over the years, Pikachu has become so popular that it serves as the Pokémon franchise mascot. It is the Version Mascot and First partner Pokémon for the game Pokémon Yellow and its remake, Pokémon: Let's Go, Pikachu!. It is also well known from the anime, where Ash Ketchum, the former protagonist, owns a Pikachu.

It evolves from Pichu when leveled up with high friendship and evolves into Raichu when exposed to a Thunder Stone. When in Alola (Pokémon Sun and Moon and Pokémon Ultra Sun and Ultra Moon), it evolves into Alolan Raichu through exposure to a Thunder Stone. It also has a Gigantamax form, and can be found in Cramorant's Gorging Form.