Zatch Bell!, Volume 10 — Makoto Raiku

Zatch and Ponygon decide to sneak into school by hiding in Kiyo's bag, but a sudden bout with a common cold earns Zatch a quick trip to the nurse's office. Meanwhile, Kiyo is reunited with Apollo, but Apollo's mamodo partner Rops is nowhere to be seen. It seems that Apollo and Rops had a run-in with Zatch's mysterious and dangerous double, and things took a turn for the worse.