Zatch Bell! - Season 1 Episode 65

The team is attacked by two momodo's right after their fight with victoream. The group is in no condition to fight but luckly is saved when Laila,one of the attacking mamodo's turns out to be a traitor and saves the group. It appeares two mamodo's controled by z can't attack each other. While Dalmos powered up and attacks Laila advises them to run. After giving his book to Tia so she can protect it, Zatch and Kiyo team up with Laila to fight Dalmos. Dalmos gains a huge advantage though, since he can attack zatch but Laila can't attack Dalmos. After a frightening display of power Laila appears to have given up, when Ponygon appears with his book owner to take over the fight.