Once the Dark Leo designed was created and approved, it fell on TMNT: Saturday Morning Adventures artist Sarah Myer to expand on the concept and create like-minded redesigns for Donny and Raph.

Creature from the Black Lagoon Leo, and another—seemingly more mutant—version of Raph. While he only made an appearance in the comic book series, Shogun Shoate was part of the TMNT Shogun ...