He’s usually where you least suspect him.

Episode 11: ズウィージョウを捜せ！ – Zuwījou o Sagase!
(Where’s Zuwijo?)
Manabu asks Yudias if he knows where Zuwijo is. It seems that Zuwijo is linked to the incident that happened at Mutsuba Cable TV’s studio the other day. Realizing how powerless he is, Yudias decides to train some more. And so, Manya suggests a special training session from hell to him!

NOTE: As it turns out, the title is a reference to “Where’s Waldo?”

Source