A pirate-themed ghost who had laid dormant in a treasure chest. In its basic form, Piraniak looks like a catfish with a pirate's hat and an anchor-shaped tail. In booster mode, Piraniak looks like an eel with a treasure chest for its stomach, it has an eye patch on its left eye, a ring in its pirate hat, and now its tail is shaped like a hook. Piraniak's power is to hypnotize people into stealing gold for him. When it's in booster mode, it uses its treasure chest-like stomach to get gold.