I did have the idea that a horror movie.
Bears and other stuffed animals creating problems.
Minions that serve some powerhouse supernatural villain could be a demon.
Doubtful build a bear would let you build a grim reaper even if they had the supplies.
This shredder looks like they've burrowed from the silver samurai combined with super shredder as the blades including on his knuckles are very long.
If we don't see shredder without his mask off it does make you wonder if he has any scares or disfigurements on his face, and a psychological advantage much like Boba Fett.
Are the ninja masks basically bandanas with holes cut in them?