Preceding Oxide are four boss characters : Ripper Roo , a deranged straitjacket-wearing kangaroo ; Papu Papu , the morbidly obese leader of the island 's native tribe ; Komodo Joe , a Komodo dragon with a speech sound disorder ; and Pinstripe Potoroo , a greedy pinstripe-clad potoroo .
There are four bosses : Ripper Roo , Papu Papu , Komodo Joe and Pinstripe Potoroo .