ok you anime finatics. i need your help on a anime show. can you please give me the name of the anime or it's characters

this anime show is about 3 guys and a male kid who travel together defeating monsters. one of the guys is a monk. another guy is a gambler who likes smoking ang hot women. another guy has a pet dragon and the kid was found by the monk locked in a cage with a chain around his neck? if you know what i am talking about please answer my question. thank you