Limit Form

Limit Form is a Drive Form which appears in Kingdom Hearts II Final Mix. It uses neither of your team members, and consumes four of Sora's Drive Bars. It represents Sora's past, and is obtained along with the Oathkeeper at Twilight Town, after Sora learns about Kairi's abduction. Its emblem is a silver crown.

Mechanics
Limit Form is gained after the second visit to Twilight Town. In this form, Sora's Magic commands are replaced with "Limit" commands, whereby special abilities from  can be accessed for a set MP cost. Limit Form gains one experience point for every successful use of Sora's limit. Limit Form is also the only form that lets Sora use the Guard and Dodge Roll abilities.

As with Valor Form, Limit Form disables the use of magic, preventing the user from using Cure. However, each hit from a Limit recovers some HP, even if it misses, making Sonic Blade an effective way to recover HP above 1 in a tight situation.

Most Limit attacks do not have invincibility frames as they did in Kingdom Hearts, with the exception of Sonic Blade. This form secretly has the ability to jump just a bit higher than normal form, however, once High Jump Lv2 is obtained, it won't matter much

Strategy
To effectively level up Limit Form, equip as many Form Boosts as possible before engaging in battle, including Oathkeeper, and repeatedly use the Sonic Blade limit, which costs the least amount of MP to use, until you have no MP left. Return to a Save Point to recover your MP before returning to battle. Repeat the process until your Form gauge is about to run out, then leave the world and return to refill the Drive Gauge to maximum. Continue in this way until Limit Form reaches the level you want. As this form is exclusive to Kingdom Hearts II Final Mix, it is recommended to make use of all the additions that are exclusive to Kingdom Hearts II Final Mix to level up Limit Form: the best places to level up are in the Cavern of Remembrance, where there is an abundance of Heartless, and in the Treasure Room in Agrabah, where Mushroom No. 5 can be found. The latter is recommended as the player has the benefit of a nearby Save Point, and can always use it to return to the World Map if Sora's Drive Gauge is low.

Because Limit Form doesn't require any party members, the Battle of the 1000 Heartless can be very effective to level up.

Another good way to level up this form is to go to the Altar of Naught if the player has defeated Xemnas's first form. Exiting the Altar of Naught will lead to Ruin and Creation's Passage. By using Limit Form when the Nobodies, many of whom are Berserkers, appear, Limits can be used until all Nobodies in the top area leading to the Altar of Naught are defeated, or the MP gauge runs out. Entering the Altar of Naught will immediately fill up the Drive Gauge, and the player can repeat this for a simple way to level up Limit Form.