I would like to see "Fling Poo" from the Opo-Opo. But we already have 2 spells from them.

I would like to see some less common spells, but at the same time you have to make them somewhat available to everyone. There are only so many Adamantoise. I think a good idea would be for some specific BCNMs that only BLU can enter solo. Kind of like the 20 cap SMN battles. Maybe defeat a rare type of mob in order to learn its spell?