Fashion items or potion pots (Premier mog items vs reward), mimic item

As I play various battles and fight bosses, I thought to myself how nice it would be to be reward some sort of items that lets me temporarily glam up as small versions of all the bosses and walk around the cities.

This item could be considered Fashion items(permanent), potion pots that work as moogle event costumes, or Premium moogle shop buys 10 pots for X dollars.

I'd also thought of an items called "mimic mirror". Basically, a temporarily costume of target players gear layout with limited timer (30sec)?