What is Pikachu’s official species classification in the Pokémon series?

Pikachu’s official species classification in the Pokémon series is Mouse Pokémon.

Pikachu is an Electric-type Pokémon with yellow fur, pointed ears, red cheek sacs, and a lightning-bolt-shaped tail. Its design is associated with a small rodent, and its Japanese name combines “pika,” a sparkling or crackling sound, with “chū,” a mouse sound.

Pikachu’s design history includes several influences. Atsuko Nishida created the original design, while Ken Sugimori finalized its presentation for the games. Although the character is commonly described by fans as mouse-like, the official Pokédex classification is the specific phrase “Mouse Pokémon.”

Pikachu first appeared in the original Game Boy games but became especially famous as Ash Ketchum’s partner in the animated series. Its prominent role helped make it the franchise mascot, even though it was not one of the three selectable starter Pokémon in Pokémon Red and Blue.