The Shredder is a minor character, featured in Teenage Mutant Ninja Turtles: Mutant Mayhem, in its post-credits scene, wherein he appears as an old acquaintance of Cynthia Utrom.
There are roughly one-sh*t billion tropes so PLEASE look through them before adding one. Otherwise add what you like. ADDITION: PLEASE read through the trope description provided before submitting something. It's not a huge deal but too often people submit characters that don't fit just because they misinterpreted the title...
