Back in 1996 someone in over at TV Tokyo decided that there needed to be a two episode OVA based on the Teenage Mutant Ninja Turtles, but not just the TMNT that we know. The first OVA, called SÅ«pÄ TÄtoruzu Dai Pinchi! Seinto TÅjÅ! (The Great Crisis of the Super Turtles! The Saint Appears!), was based on the Super Mutants toy line. Which happens to look a bit like a sick (the ill kind of sick) Wolverine.
The second OVA, called Shugo JÅ« KÅrin Metaru TÄtoruzu TÅjÅ! (The Coming of the Guardian Beasts – The Metal Turtles Appears!), was based on the Metal Mutants toy line. Which look like the Turtles wearing Gundam armor. Both of these OVAs can be found in the VHS tape called MyÅ«tanto TÄtoruzu ChÅjin Densetsu Hen and that translates to Mutant Turtles: Superman Legend. No joke.
If I can find these episodes I might do a review.
Source: Turtlepedia