Racin' Chocobos
After you've caught your chocobos, you can go to the Gold Saucer and register them to enter races against the in-house chocobos. The controls for racing are fairly simple, but you can also set it to "Auto" mode where the chocobo runs by itself and you don't have you do anything. You chocobo starts with a racing class of "C" and as you win races it will move up the ranks to "B" class, then "A" class, with "S" being the highest racing class you can achieve.
Chocobo Racing