Yamcha (ヤムチャ) is a protagonist in the Dragon Ball anime and a supporting protagonist in Dragon Ball Z and Dragon Ball GT. Yamcha was once a desert bandit and an enemy of Goku but soon became an ally and a member of the Z-Fighters. Yamcha is one of the few humans who know about tha art of ki. He is the ex boyfriend of Bulma and is Paur's lifelong friend.
The name Yamcha is a pun on Yum Cha (literally means Drink Tea) is a is a chinese morning or afternoon tea, which involves drinking Chinese and eating dim sum dishes.
Yamcha much like many Dragon Ball characters is based on a character from Journey to the West who may likely be Sha Wujing as both are very strong bandits who eventually loses their evil way and help the heroes. Yamcha after haircut have striking similarities with Tsukutsun Tsun from Dr Slump.