Teenage Mutant Ninja Turtles

The original Teenage Mutant Ninja Turtles movie from 1990 is the story of how a foursome of small turtles were mutated by a green radioactive goo and turned into human-sized turtle crime fighters. Their large rodent mentor, Splinter, teaches them to master the martial arts. They're also gifted pop musicians, so they can rock the house while they're cracking a crime wave.