I was acting under the impression that there were only three instances of yetis in the Teenage Mutant Ninja universe: an action figure, comic book character, and live-action mobster.
An anonymous tipster alerted me to a fourth one: the Biotroid.
Did you know?
The alien Kraang created robot yeti called Biotroids that they control in a couple episodes of the popular "Teenage Mutant Ninja Turtles" CGI cartoon (2012 to present).
They have butt cannons.