Zatch Bell!

The Rematch: Gash and Hyde Meet Again (1x13)

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Eito and Hyde coincidentally find Kiyo and Zatch and wanting revenge, decides to follow them to school. Eito reminisces how he found Hyde's book and remembers how he wanted power after being bullied. Zatch finds the pair when he smells Eito's Yellowtail burger and a battle ensues. Hyde amazed at Zatch's progress flees with Eito. Eito decides to challenge Kiyo and Zatch again by holding Kiyo's friend's hostage in a water tower. Kiyo and Zatch gain the advantage during the battle. When Eito sees Hyde's determination to win, the book glows revealing a new spell. The spell collides with "Rashield" and in the explosion, Eito and Hyde make their escape.