Flinter

Flinter is a Rat miniboss located near Don, Leo, Raph and Mike in the mission Splinter Group, and, like them, is more heavily mutated than the usual Rats.

Trivia
Flinter, Don, Leo, Raph and Mike are references to Teenage Mutant Ninja Turtles characters: Splinter, Donatello, Leonardo, Raphael and Michelangelo.