Don't let this post's title mislead you. This isn't some obscure cartoon crossover special. This is a hilarious and accurate parody of Teenage Mutant Ninja Turtles as seen on Tiny Toon Adventures. Don't you just love it when early 90s phenomena collide?
The whole segment isn't available on Youtube, but here's the theme song, which is definitely the funniest part of the episode. Sit back, relax, and enjoy "Immature Radioactive Samurai Slugs".