After Tony Tony Chopper at chocolate out of the trash, he died. The Straw hats went back to Drum Island somehow to find a new Chopper. They found Chopper Chopper Tony, the new Chopper. He is like the original chopper, but not!
Chopper is a fearless Deer who has devoted his existence to combat. His urge to fight stronger opponents and relish in the fight has left mountains of the dead in his wake. He is ferocious and does not show mercy, even when an opponent is clearly outmatched. Above all, he seeks a challenge.
Despite his keenness for battle, Buggy has stated that Chopper was a man of great depth. Unlike most Deer's, he does not eat human flesh, neither is he sadistic nor cruel, nor does he enjoy torturing humans or having to kill weaklings. He does not kill for the sake of it, only for the thrill of battle. Indeed, more than once Chopper has expressed great melancholy in his choice to become an Deer as it has made him too strong to find a challenge. For those who survive their first encounter with him, and thus prove themselves worthy opponents, Chopper has nothing but respect. He holds anyone who can harm or even defend against him in great esteem, such as Guts and the Skull Knight. It is implied Chopper greatly respects Guts for being a formidable match despite being a human.