Yamcha is a pretty boy that knows how to fight. He is weak compared to the rest of the Z warriors(except Chiaotzu). He plays a fairly big role in DB and DBZ but never really is a main character. He started off as a desert bandit who didnt know how to talk to girls. Well Bulma changed that and he soon became one of the good guys. Yamcha dies once in the battle with Vegeta and Nappa and thats basically it. He didnt play a big role in the rest of the sagas. It seems that he was too afraid to help out after getting a hand stuck into him by an android. He isnt as brave as Tien. You will see why when I do the android saga. Yamcha also mastered many attacks. One of which he can control where the attack goes. Like Tien he isnt in DBGT basically at all mainly because he was to weak to fight. Overall Yamcha will fight if he has to but he doesnt really like to.