Board Thread:General Discussion/@comment-25020257-20140604191005/@comment-6576725-20150427215516

Perhaps the good dog like mutant can be friends with the cat mutant. I actually of having Scratch becoming a character.This guy > http://turtlepedia.wikia.com/wiki/Scratch

Basically he was on the people the Kraang experimented to mutagen on along with a few other people. Including the real Irma (whose identity was taken by Kraang Subprime). The Turtles get captured by the Kraang in a trap and have to work with the other mutants there to find a way for all of them to escape.