What is the name of this game?

Its a really old game. I think it was made in 1999 or 2000.. Its something like unreal tournament where you have death matches with the computer. The theme of the game however is not gory and bloody like Unreal Tournament...Its more like a cartoony, funny, kiddish game. I don't think the game has any particular story, its just a fun arcade game where you shoot everyone and the last one standing wins. The game has a 3rd person view. I know only 3 characters from the game which you can play as and their names are - Chuck (a fat soldier with a green uniform and a green cap), Lenny (a black guy in a red suit with the symbol of a lighting bolt on it. And he can run really fast like the superhero, Flash from Justice Leauge) and a female ninja. Does anybody know this game?