Ok, so one day I was thinking,

"Hey, if I left my Highwind at Cactus Island, used my Gold Chocobo to ge back to the stables, and released all my chocobos, would the game be unable to progress?"


and I think that would be the case.

Cause you can catch Good Chocobos around the Gold Saucer (which you can get to from Junon, the boat still works)

and your 2 Good Chocobos, with Carob nut purchased from the Gold Saucer, at 200 gp a pop, would get you your Green, Blue, and Black chocobos,

And so you go catch your Wonderful Chocobo

but,

how do you get your Zeio nut?

Youre stuck..