I did the secret egg combination in each city and got a lot of potions, but no chocobo cap. My next idea was to try with a motley egg with each secret combo. Has anyone done every combination possible? There's no ultimate reward? Or anyone have all achievements?

I do have all of the caps and rings so far except for the chocobo ring, which I'll get when I get home from work. I didn't know you had to talk to the 2nd NPC >.<