In the previous episode, there are a few flasbacks with Tia either making fun of Zatch or chasing him around. Why didn't Tia realize that it was Zatch all along? She doesn't appear to have lost her memory, and she was able to recognize Maruss just fine.
Tia: I mean, why help us? What's in it for you?
Kiyo: Amazing... Call me crazy but I can't believe you just said that!
Zatch: (bows head down in sadness) Recently, I met a Mamodo named Kolulu, she hated violence but was forced to fight against her will. And I haven't forgotten what she told me.
(flashback of Kolulu saying to become a benevolent king)
Zatch: That's why I'm here and that's what I'm fighting for! To become a kind king, Tia!
(Tia gasps surprisingly)
Zatch: And once I do, I'll put an end to this useless violence once and for all!
Part two of a two episode battle.
Aired in Japan July 20, 2003.
Covers chapters 35-38 of the manga.
Chapter 35: A World of Enemies
Chapter 36: A Solitary Warrior
Chapter 37: The Culmination of Battle
Chapter 38: A Trustworthy Friend
How Zatch beat Maruss: He kept on getting close to maruss and using Zaker. Tia also rescued him for Maruss' Gigano Garanzu.
8 out of a 100 mamodo have been destroyed so far.
'Gash and Tio's New Promise'
Maruss's 4th Spell:
Gigano Garanzu - Summons a huge rotating metal drill