By travelling to the Chocobo Ranch in Final Fantasy 7, players can talk to Choco Bill to start a chain of missions to unlock a variety of chocobo-related features, including Chocobo Breeding and Hot & Cold.
By playing Hot & Cold, players can collect Chocograph fragments. Once a certain number of fragments have been collected, a Chocograph item will be added to the player's inventory. By looking at the item, a room's description will show up, revealing where the player must travel to to find the Chocograph's reward. Once the player is in the correct room, activating the chocograph will give the reward.
Ozma is a Super Boss which only those who have mastered Chocobo Breeding and Hot & Cold can challenge to receive powerful equipment. He is located in the Garden field and can be unlocked by finding a Yan using a Garden Chocograph.