Flat Top was once a normal geeky teenager from the High School April, Casey, Collin Macey, Striker and Tristan Taylor go to who was captured by the KRaang and mutated into a flounder. He escaped and fled into the sewers, where he eventually encountered the Turtles when they were heading out to go on patrol. He was afraid at first, but warmed up to them eventually. He was eventually brought to Collin MAcey, who gave him refuge at his mansion. Because of his flat body, he was nicknamed Flat Top by Michelangelo. While he doesn't like fighting, he still can, and is actually stronger than he looks. He can throw a mean punch.