Growth Egg

Growth Egg is a recurring accessory in the Final Fantasy series. It usually doubles the amount of EXP characters earn from battles.

Final Fantasy VI
The Growth Egg, originally called EXP Egg, is a Relic that can first be obtained in Darill's Tomb through a secret passage. More Growth Eggs can be obtained by either Metamorphing Vasegiatta, Marchosias, and Galypdes, or by betting a Tintinabulum in the Dragon's Neck Coliseum. The Growth Egg doubles the amount of experience gained by the wielder after every battle and do not stack.

Final Fantasy X-2
The AP Egg carries the Triple AP Support Ability, and also increases the user's Luck by 15. It can be found in the Ruin Depths, and is also a prize from a Blitzball League or Tournament.

Final Fantasy XIII
Growth Egg doubles the amount of CP earned, and is the reward for the Chapter 11 Mission 55. It can be sold for 250,000 gil.

Final Fantasy: The 4 Heroes of Light
Growth Egg doubles the amount of EXP. It can be sold for 2,000 gil.

Dissidia Final Fantasy
Growth Egg is a Special Accessory that increases the Exp. earned in battle by 20%. It can be traded for in the shop for 1,900 gil, a Growth Seed, three Chocobo Wings, and a Chocobo Feather.

Dissidia 012 Final Fantasy
The Growth Egg returns with the same effect and trade requirements as in the first game, but its price is raised to 3,000 gil.