In Teenage Mutant Ninja Turtles: Mutant Mayhem, the Heroes in a Half Shell face their biggest test. Granted, it's their first large scale mission after beating down thugs in Manhattan over the course of a few months. Still, it's not something one would expect 15-year-olds to be capable of handling.
Source：https://www.cbr.com/tmnt-mutant-mayhem-ending-explained/
