How do you get a chocobo on Final Fantasy 2?

A few Chocographs provide hints about locations where Choco can dig up a "Power Up." In this case, instead of finding treasures, Choco will fall asleep and go to Chocobo's Dream World for a moment. Here, Fat Chocobo (god of all Chocobos) bestows upon Choco a new ability, which in turn changes Choco's color. Each color indicates that Choco has attained a new ability. The abilities are cumulative, so Choco will not lose a previously gained ability just because he has turned a new color. When Choco is light blue, he has the REEF ability and can search the reefs (light-blue areas of the ocean) just offshore. A red-colored Choco has the Mt. ability and can run across mountains and ridges, which were previously impassable. This also enables Choco to search the high ledges to the left and to the right in the Chocobo's Forest area. However, you should only search up there when it appears that there's nothing on the ground. A dark-blue-colored Choco with the SEA ability can swim across any part of the ocean. Finally, a gold-colored Choco with the SKY ability can lift off from or land in any forest area; simply press the X button to do so. This enables a gold Choco to reach islands and areas that not even an airship can access. Continue digging up Chocographs in the Chocobo's Forest until Choco tells Mene that there are no more Chocographs to find. Once the party has a vehicle, pilot the party to the small strip of islands south of the western Forgotten Continent. Land on the island where you see chocobo tracks, and use a Gysahl Green to summon Choco. Choco must have the REEF ability to travel in the light blue colored water areas to find Chocobo's Lagoon. Ride Choco north across the reefs in this area, curving south until you reach an island with a cave visible in the side, close to the reef. When you see the "?" appear, ride in with Choco. This is Chocobo's Lagoon!