Limits are special attacks introduced in Kingdom Hearts II. Available only when an active party member has the appropriate action ability equipped, Limits enable Sora and that party member to initiate devastating combo attacks at the cost of all Sora's MP. Limits can be performed from the command menu. Limits cannot be used while Sora is in a Drive Form.
Upon activating a Limit, the other character in the party besides Sora and the party member performing the Limit vanishes, and the two remaining unleash a powerful attack. For a short time after activating the Limit, the player and the other character performing the Limit are invincible, and a Limit Gauge appears in the upper-right; until the gauge is depleted, the characters involved can initiate a series of powerful attacks, which are either slotted over the Attack command or activated as Reaction Commands. This leads up to a powerful final attack, available once the previous attacks have been used enough times.
Limits are generally more effective against general enemies than bosses, as they tend to use area of effect damage and crowd control effects, which most bosses are resistant against. Limits also count as finishers, enabling them to defeat bosses. Some limits allow Sora to move freely, while most others restrict movement. Also, most Limits feature a "Stop" command in the fourth slot of the Command Menu, allowing the limit to end prematurely.
Jiminy's Journal records information detailing the attack flow and general pattern of each limit in addition to the highest amount of hits the player has achieved for each limit.
Auto Limit is a support ability that can be equipped on any party member, except Sora. This ability will make the equipped limits accessible by Reaction Command, though if the party member has more than one limit equipped, or there are more than one party members equipped with limits, the Reaction Command will be completely random.
List of Limits
Sora can also perform a unique limit with each of his Summons without needing to equip a certain action ability. Instead of MP, these cost part of the Summon Gauge to use.
In Kingdom Hearts II Final Mix, the new Limit Form features limits that mimic attacks from the original Kingdom Hearts. They are pre-equipped as action abilities and are automatically assigned to particular shortcut buttons. They can be used solo and each Limit costs a finite amount of MP, not the entire gauge. Despite being classed as Limits, they are not listed in Jiminy's Journal.