Yokai fusions suggested by @4-of-a-kind, I couldn’t think of names so nyeh. :P

Allnyta + Siro → During the night time, it makes people forget the task they were doing

Frazzel + Quaken → Has the power to make electrifying earthquakes, likes to balance on its staff

Casanuva + Count Cavity → Makes people love sweets to the point of eating too much that their teeth rot and deteriorate

Shutcry (her fan-kai) + a Tattletail (right, that’s what you meant? lol)→ Makes people have bed hair, even if they weren’t sleeping for long or at all

Unkeen + Casanono → Makes people break up and focus on the breakup a lot in a very pathetic way