Pikachu, the Mouse Pokémon. It can generate electric attacks from the electric pouches located in both of its cheeks.
– Dawn’s Pokedex
Pika pika!! Pikachu is pretty much the mascot of the Pokemon franchise, probably due to Ash’s Pikachu from the anime. It’s quite cute, so not surprising that it’s become iconic.
Unlike Ash though, I wouldn’t use a Pikachu in my team. It is unevolved after all (300 total base stats). It’s fast (Speed being its highest stat), but a lot of other Pokemon are faster. As an electric type, I prefer Jolteon to Pikachu.