Create the most powerful gym, connect athletes! A large gym is at your disposal. Your task is to get new athletes, combine similar ones to get more powerful athletes. The most powerful athletes can be taken to a boxing competition. You need to click as often and quickly as possible to defeat your opponent in a difficult battle. Merge Muscle, sports game, athlete upgrade, boxing, combine athletes, strategic gameplay, gym management, combat game, kids friendly, no blood, mobile game, sports competition, powerful athletes, character collection, upgrade athletes, team building, boxing battles