Some TMNT stuff really isn't for little kids.
According to the Turtles' ending, Krang attempted to send them to Dimension X to prevent them from interfering in his invasion of Earth. However, the Turtles instead ended up on a parallel Earth being menaced by Brainiac. Along with his brothers, Michelangelo fought a variety of heroes and villains.
After Brainiac was defeated, the Turtles were given a "Super Salty Pizza" by Harley Quinn; this pizza had been treated with the nanotech 5-U-93-R, temporarily turning them into "ultra-turtles." Returning to their own dimension, the Turtles were enhanced enough that Michelangelo was able to easily tackle Shredder single-handedly.
- The bottom of Michelangelo's skateboard has a decal of an apple with "BIG" printed on it, with a "3 AM" sticker below that—referencing the first stage of the video game Teenage Mutant Ninja Turtles: Turtles in Time, Big Apple, 3 AM.