Raichu is an Electric-type Pokémon introduced in Generation I. It evolves from Pikachu when exposed to a Thunder Stone. Raichu is known for its speed and agility, making it a formidable opponent in battles. Its body is orange with a cream-colored underside, and it has long ears and a lightning bolt-shaped tail. In the Pokémon universe, Raichu can generate electricity and release it in powerful attacks. It is often seen in areas with thunderstorms, where it can absorb energy from the atmosphere. Raichu also has a regional variant called Alolan Raichu, which has a dual Electric/Psychic typing and a different appearance.