What are the most difficult Yo Kais in YW2?

I'm making a list to see if I have the rarest yo Kai to get in yw2 without hacking the console or cheats, the normal game.

I have all three digital cats. -3 pandanokos. -Lavadenco, Statinarch and the three fusion objects obtained in the blasters.

What other rare I Kais do I have left?