The remaining four keys are stolen and Chazz and the Ojamas decide to figure who is behind it. After a series of false deductions, they are confronted by Don Zaloog, the fourth Shadow Rider and leader of the "Dark Scorpion Grave Robbers", a group of duel monster spirits. Don Zaloog realises he must defeat Chazz if he want to use the power of the spirit keys, and so a duel between them commences. Chazz triumphs by fusing his Ojama trio into Ojama King. The Dark Scorpions decide to join Chazz and hang out in his room with the Ojamas and the other monster spirits, much to Chazz's annoyance.