If one of your MMA dolls, erm, action figures has proven himself to be better than the rest, doesn't he deserve a championship belt? You're in luck. There is an Etsy store that can help you with that.
When one of your action figures wins the belt, all the other ones will yell, "I want my belt back!" or "I want B.J.'s belt!" They may even get on their knees to beg you for a title shot, but at some point you will have to make hard decisions on which doll gets the next chance to win the title.