I Think His Name is Baxter Stockman

Plot
After skateboarding in the lair, Splinter grounds the turtles, keeping them from going to the surface. After sneaking out, they meet a villain named Baxter Stockman that once work in a building called TCRI. After Michelangelo leaves his T-Pod, a music player that Donatello gave to Michelangelo, Baxter Stockman finds it and uses it to transform himself into a super villain. After Splinter finds out, he orders them to battle the villain.