Which Pokémon is numbered 025 in the National Pokédex?

Pikachu is numbered 025 in the National Pokédex.

Pikachu is an Electric-type Pokémon introduced in the first generation. Its yellow body, pointed ears, red cheek pouches, and lightning-bolt-shaped tail made it one of the most recognizable characters in the franchise. Pikachu evolves from Pichu when it has a high friendship value and evolves into Raichu when exposed to a Thunder Stone.

The animated series made Pikachu especially prominent by choosing it as Ash Ketchum's partner. In the games, however, Pikachu is not the player's only possible first partner in the original adventure. Players choose Bulbasaur, Charmander, or Squirtle in Red, Green, and Blue, while Pokémon Yellow gives Pikachu a central starting role.

Pikachu's Pokédex number is sometimes confused with its evolution family. Pichu is number 172 and Raichu is number 026, so 025 identifies Pikachu specifically rather than the entire line.