This is Rocksteady, as seen in the TMNT toy line.
When I watched TMNT II movie for the first time, I got really disappointed that the two new evil mutants that were going to be created by Shredder's team weren't Bebop and Rocksteady. Recently, I've read that the original idea was bringing both Shredder's mutant henchmen to the big screen, but Kevin Eastman, co-creator of the Ninja Turtles, didn't want them in the movie. So they created Tokka, a mutant sea turtle, and Rahzar, a mutant wolf, to replace Bebop and Rocksteady in the movie. They're cool characters, but I think that the original idea would have been better.
Hope you like it!