Tortletummy is a giant, massive, green turtle with small eyes, a red pipe-shaped mouth, a smooth black shell, and a helmet on his head.
Tortletummy will start out sleeping and snoring. But, if one of the Kirbys hit his stomach, he'll wake up, get mad at them for disturbing his slumber, and the battle will begin.
Tortletummy has no form of attack, but he'll try to blow the Kirbys away from him. As this progresses, some miniature Jellyfrizz will appear and horizontally try to hit the Kirbys. The currents become more stronger as the battle goes on and the Jellyfrizz will get slightly bigger. The Kirbys must hit Tortletummy's stomach several times in order to defeat him. When they do defeat Tortletummy, he'll burst into bubbles and the Kirbys can exit the room they just fought him in.