Episode Title: "Another Zatch"
Description: After learning about the ongoing Mamodo tournament from Kiyo, Seitaro directs him to the forest where Zatch was found. Along the way, the boys pass through a village where its inhabitants shirk Zatch in fear, much to Kiyo's confusion. At the edge of the forest, they encounter a charter bus with Megumi and Tia, who tip them about Zatch's resemblance nearby, thus confirming Robnos. Deep in the woods, Zatch accidentally provokes a nest of snakes but is saved by Prof. Dartagnian, Seitaro's eccentric coworker who has been researching the forest on an explosion that occurred there six months ago. Kiyo and Zatch reach the explosion's epicenter, where the latter is suddenly engulfed in an intense golden glow that restores some of his memories. He reveals that the explosion was the result of his lookalike attacking him over something he possesses. The enemy sapped his memories before marooning him in the woods where he dwelled in relative solitude until Kiyo's father rescued him. The epiphany has also unlocked Zatch's fourth spell: "Bao Zakerga."
Zatch Bell Season 1 Episode 21