Basically a bunch of toys that transform you into something else. some dungeon/trail/raid bosses use them. I know ffxi had the chocobo beret (would change you into an egg that would hatch you into a chocobo once clicked)

Such creatures:

Toad
Imp
Water Imp
Fire Frog
Chicken
Enkidu
Moogle
korpokkur
Old Crone

There's a few others! (but i forgot their names)

maybe replace their attack animations with cosmetic effects?
perhaps they could be dungeon/raid drops? or Blue spells?

(Never before have i felt such peace until i began hopping around as a korpokkur..)