Naomi, Zatch's bully, is tormenting Zatch in the park as usual, when suddenly a giant Frankenstein-like man scares Naomi away and saves Zatch!! Kiyo and Zatch keep a careful watch on this big mamodo guy, Shin and his companion Eshros, for they too have a spell book. Seeing Shin perform all kinds of good deeds, Zatch is convinced that Shin is a good mamodo! But Kiyo overhears Shin and Eshros talking, only to find that Eshros is the mamodo and Shin is the human! Eshros, nasty beyond belief, tries to urge Shin to battle and do evil deeds. And he is close to convincing Shin to use his powers to destroy his old school! Zatch and Kiyo confront the two to keep them from causing harm. But this new pair has a never-ending string of powerful spells! How can Kiyo and Zatch possibly beat them? Zatch and Kiyo refuse to back down, but Eshros and Shin are too strong! They win and Shin has an unequalled opportunity to burn Zatch's Red Spell Book and send him back to the Mamodo World forever!!! Just when all seems lost, a surprising thing occurs
Shin realizes that Eshros has been controlling and using his feelings to do evil, and refuses to be the vehicle for Eshros' bad intentions.
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