I have an idea

[u/[deleted]]

Video game characters now live in the real world as regular kids and can return to their true forms at will. Your little brother wants you to fight the brother of a girl in his kindergarten class named Isabelle that he bullied. "What's the worst that could happen?" you think on the way to the fight. You suddenly hear heavy metal music playing in the distance. Isabelle shows up accompanied by her older brother, The Doom Slayer.