Ep 3. So Giaku, The Water Dragon Of Rage!

Penny's persistent water spells are relentless and Zatch and Kiyo are suffering terribly, while Penny delights in their misfortune. Observant Kiyo realizes that the reason Penny is filled rage is because Zatch doesn't remember her from the mamodo world. He tries to get Zatch to make up with Penny but a misstep ends up making Penny angrier!