The story about Mutant Leader from LEGO® The Batman Movie
Strong, tough and stubborn, the Mutant Leader’s biggest “power” may be his general thick-headedness and inability to never back down from a fight. As the undisputed leader of the street gang known as the Mutants, he’s used to using shouting to get his way, and if that fails, then he’s happy to use his fists instead. The claims that he comes from a retro-futuristic alternate timeline are probably just rumors.
Bat-Fact: Not sure if he’s actually a mutant, or just dresses weird.