These giant mutagen-producing creatures from Dimension X can grow over 100 feet in length. We can only imagine they've got quite an appetite...
He's Splinter's right hand man. Or would it be his right paw man? Either way, he's dangerous.
When Raphael's pet tortoise Spike got mutated, he transformed into this crime-fighting machine. Not even the Turtles can control him now...
TIMOTHY (A.K.A. MUTAGEN MAN)
With tentacle arms and an extendable mouth and eyes, Mutagen Man certainly wins the award for most flexible mutant!
These mutant squirrels multiply after crawling into somebody's mouth. Yuck!
ICE CREAM KITTY
Part ice-cream, part kitty. Ice Cream Kitty is definitely the tastiest mutant around.
Clowns? Spiders? NO MORE PIZZA?! Whenever you get near this giant mutated mushroom you'll start thinking your worst fears are coming true!
THE GIANT RATS
Looks like Splinter's not the only rat in town... These giant rodents were bred by the Rat King for one purpose, to destroy humans!
When April's father, Kirby O'Neil, shielded her from a falling cannister of mutagen, he became this gruesome flying menace. Talk about Father of the Year!
Squirreloids can also take on this (seemingly) much more adorable form. They may be tiny, but they're quite relentless. You've been warned!