Zeno is actually Zatch's twin brother. This will not be discovered until much later in the show.
Kiyo: That's Baltro?
Zatch: He's surprisingly...
Steng: Baltro, finish them!
Kory: They showed me some things are worth fighting for!
Steng: That professor's son is one of us! Did you know?
Zeno: Of course I did. And you let him beat you isn't that right, Baltro?
Steng: Wait a second! What's going on here?
Zeno: (burns Baltro's book, chuckles) He's had his chance now it's for him to return to the other world. Those are the rules right, Baltro? (laughs)
Aired in Japan on August 24, 2003.
Covers chapters 43-46 of the manga.
Chapter 43: The Biggest Mamodo
Chapter 44: Beyond Fear
Chapter 45: Kiyo's Father
Chapter 46: The Puppet Master
How Zatch beat Baltro: Kiyo remembered how when he burned the flower inside the suit of armor and it stopped moving, so Kiyo burned the flowers on the giant suit of armor Baltro was in and the arms fell off.
Eventhough Zatch defeated Baltro, he didn't burn his book, Zeno was the one who burnt the book.
10 out of a 100 mamodo have been destroyed so far.
This is the first episode that Zeno has any dialoge.
Baltro's armor is controlled by flowers.
'Annihilation! Batro Fights Back!'