Jake was created in a lab with an aborted turtle fetus! It was injected with pure star power! He was treated like a son by Bowser. When the koopalings got jealous they kicked him into lava and told Bowser that Mario killed him. A week later he had climbed out of the lava weak and burnt! When he had regained enough energy he had walked back into the castle hoping for help but no one came. He eventually found Bowser but he had made someone else named Captain Basilisx.
Now searches the world to kill anything in his path!