Pikachu is Ash's loyal and fateful Pokemon also his first Pokemon he travels around the world with him and man is he cute or what?

Full name: Tony Tony Chopper
AKA: Chopper
Affiliation: Straw-Hat Pirates (Doctor)
First Manga Appearance: Chapter #134
First Anime Appearance: Episode #54
Weapon: Rumble Ball
Devil's Fruit: Hito Hito no Mi – Human Human Fruit
Fighting Style: uses the Rumble Ball to transform into seven different “points”

The Straw Hat Pirates found Chopper in the Kingdom of Drum. He is a reindeer who ate the Hito Hito Fruit. He was exiled from his clan of reindeer and raised by Doctor Hiriluk. Hiriluk unfortunately was killed and Chopper became Doctor Kureha’s apprentice. Luffy “cured Chopper’s broken heart” and now he sails at sea with his new nakama. He is able to transform into three different forms, reindeer, human, and normal.