Zatch Bell!

Battle in Hong Kong Part 2 (1x38)

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After exiting the elevator, they meet Zabas who reveals his intention to kill Wonrei while he is in his cell. Kiyo and Zatch decide to distract Zabas while Li-en tries to free Wonrei. Wonrei reveals no intention of escaping fearing that Li-en would be hurt in the Mamodo battle. When Zabas is about to attack Li-en, Wonrei escapes from his cell and defeats Zabas. Zatch asks Wonrei what kind of king he would be and he replies a king which protects all. Li-en and Wonrei leave but Zabas stands up ready to battle. Kiyo and Zatch defeat Zabas with the fifth spell, "Zakeruga", a more powerful and concentrated version of "Zaker". Li-en and Wonrei run into her father. He allows their relationship once seeing Wonrei's determination to protect Li-en and gives them a boat to leave the island.