In Final Fantasy IX, Skill is a command available to Zidane Tribal which contains a multitude of abilities with varying effects. Through his abilities, Zidane can, for example, escape a battle with certainty, scan foes for loot to steal, sacrifice himself to fully restore his allies' health, or cause status ailments based on his equipped thief sword.
In Final Fantasy X, Skill is one of the four commands of the game. Skill abilities deal physical damage with an added effect, which can range from stealing items or inflicting status ailments to reducing recovery time from the attack.
All characters can use skill provided they have acquired them in the Sphere Grid.
In Dissidia, Skills are collectible abilities usable at the boards of the Story Mode. The player has five skill slots available and skills are preserved between playthroughs.
Skills return in Dissidia 012 as collectible map abilities, but can only be used at Gateways, and are still preserved between storylines and gateways. The skills available have also changed since Dissidia, the most notable addition being Chain Skills.