Okay, I've got the code for Ribbon, and while it does require some type of cheat device, it doesn't need to be Code Breaker.

The following code should add Ribbon to the American version. Note that you must keep this code on at all times while using Ribbon.

Unlike the code above, it should work on ALL cheat devices, but you do still need to convert it to your device's format if you're not using Codebreaker or another device that supports raw codes.

Adding Ribbon's data
20AED594 04018114
20AED598 00301B63
20AED59C 000A1B6A
20AED5A0 01B41B6C
20AED5A4 000A1BA8
20AED5DC 00FFFFFF
20AED5E0 00FFFFFF
20AED5EC 000000FF
20AED5F8 00004000

Adding Ribbon to the customize menu
20ADF654 80530002
20ADF658 00632035

Setting Ribbon's name
20AEFB24 71786100
20AEFB28 3A7D7E71
20AEFB2C 003A3A3A

You need to use all three sets for it to work (well, the last one is optional, Ribbon will be called "Curse Ward" if you don't). I made this by overwriting the Curse Ward ability, which is 100% inaccessible without cheating. Note that this means if you then load your save without the code, Ribbon will turn into Curse Ward. (Don't freak out if this happens - as soon as you put the code on again, it'll turn back.)



On the subject of FF8, I don't know about the American version but the European version certianly did have Chocobo World support. By importing a PocketStation, you could indeed play it and get Ribbon.