Board Thread:General Discussion/@comment-1255618-20131207105231/@comment-11341031-20140125171755

well, yeah because in The Pulverizer Returns!, the Kraang that Shredder had, informed him that the Mutagen is unpredictable, so that could be that the Mutagens are different. Like the one that mutated the Turtles and Splinter. Or like the one that mutated Timothy into Mutagen Man. or the one that mutated Kirby. Or Squirrelanoids and all those mutants.