Boost (ability)

Boost is a recurring ability in the series that increases the damage dealt by the next attack. It is associated with summoning.

Crisis Core -Final Fantasy VII-
Courage Boost! is one of Zack's DMW Limit Break abilities. It's activated by Summoning Cait Sith in Chocobo Mode, and cures Zack of Poison, Silence, Stop and Stun, and Buff's Zack with Endure, Barrier, MBarrier, MP Cost 0, AP Cost 0, Physical Null and Magic Null, with durations based on the attack level.

Final Fantasy VIII
Guardian Forces' attacks are enhanced by Boost via timed button presses. The GFs Diablos, Carbuncle, Cerberus, and Cactuar do not have Boost, since their effects either do not deal damage, or do a set amount of damage. A character's compatibility with a GF determines how much they can boost it before the animation ends. Removing Boost with Amnesia Greens is not recommended, as there is no way to regain the Boost ability.

During the summon animation, the player can hold down the button and tap the  button to boost the GF to increase damage; the drawback is that if the player fails to boost the GF, it may end up dealing less damage than it would have when not boosted at all. The damage varies between 75% and 250% of the normal damage. The percentage rises when the player taps the button correctly, but drops to 75% if the player presses the button during a time a red cross appears over the cursor. GFs with longer summon animations, such as Eden, are the easiest to boost.

Final Fantasy IX
Boost is a support ability that enhances Garnet's and Eiko's summons, showing the full summon animation each time an eidolon is summoned. Garnet can learn it for 190 AP, while Eiko can learn it for 150 AP, both from the Pumice Piece. It takes 12 Magic Stones to equip.

Final Fantasy X
Boost is a command available to the aeons if the player presses right on the command menu. It allows the aeon's Overdrive gauge to fill up faster at the cost of the aeon taking more damage. It is the opposite of Shield.

Theatrhythm Final Fantasy
Boost is a special ability that comes in three levels of power. During BMS if the player is successful in calling a summon, Boost powers up their attacks up, higher levels of Boost granting a larger benefit. Boost is learned by Cid, Rydia, Yuna and Cosmos at all levels of power.