Puar

Puar (プーアル, Pūaru; lit. "Pu'erh") is a shapeshifting animal that follows Yamcha as a life long best friend.Though sharing an appearance to that of a rabbit or cat, Puar is neither species, but is drawn a little bit to look like a cat

Puar attended the Southern Transformation Kindergarten, along with Oolong who used to bully him. Then, Puar served as Yamcha's constant companion in Diablo Desert. The two were originally a pair of desert thieves, robbing capsules and money from travelers who would cross the area where they lived. On one such occasion, after two and a half years together,] the pair meets Goku, Bulma, and Oolong.










Information from:
http://dragonball.wikia.com/