Pikachu is an Electric-type Pokémon that was introduced in Generation I of the Pokémon franchise. It is one of the most recognizable and popular Pokémon, known for its yellow fur, red cheeks, and lightning bolt-shaped tail. Pikachu is the signature Pokémon of the franchise's mascot, Ash Ketchum.

In the Pokémon games, Pikachu is often obtained as a starter Pokémon or as a gift from a character in the game. It is known for its high Speed and Special Attack stats, as well as its ability to learn a variety of Electric-type moves that can deal a lot of damage.

In the Pokémon anime, Pikachu is the loyal companion of the main character Ash Ketchum. It is often shown as a friendly and mischievous Pokémon with a strong bond with Ash. Pikachu is also known for its battle prowess, and has won many battles against opponents with its powerful Electric-type moves.

Overall, Pikachu has become an iconic and beloved Pokémon among fans of the series, and its cute and charismatic appearance has made it a popular choice for merchandise and media appearances outside of the Pokémon franchise as well.