That's all I've found a use for the motley egg. If you watch the fireworks and trade a fancy egg + the colors in the sky you get super sekrit itams (i got 3 hi-potions of int).

Can't find any way to get Chocobo Egg Hat. Tried Motley + 11111. And Motley + Firework colors. Other fancy + 1111 and firework colors. No go .