Teamwork

Teamwork (ユニゾンアスリート) is a technique that appears in Kingdom Hearts II and Kingdom Hearts 358/2 Days. It allows the user to execute a series of charging attacks. It is a signature of Goofy.

Mechanics
In Kingdom Hearts II, Teamwork is an action ability exclusive to Goofy. It is a limit that costs 3 to equip and all of Sora's MP to use. The first attack is Knocksmash, in which Goofy throws his shield in the air and Sora hits it with the Keyblade like a baseball. After five attacks, Knocksmash is replaced with Duo Raid, which allows them to throw their weapons at the enemy simultaneously, similarly to Strike Raid. The finishing move, Cosmo Boost, has Sora launch Goofy like a rocket, heavily damaging enemies he hits. While the limit is active, Sora cannot move freely, and cannot attack other enemies.

In Kingdom Hearts 358/2 Days, Teamwork is a Limit Break. It allows Goofy to repeatedly launch himself like a rocket over short distances, dealing heavy damage to enemies. The attack can be charged by holding  for greater distance. During the Final Limit, the attack can be further charged so that Goofy may launch himself over a much longer distance with greater acceleration, dealing even more damage. This Limit Break is modeled after the Cosmo Boost finisher of the Teamwork limit in Kingdom Hearts II.

Kingdom Hearts II

 * Goofy learns Teamwork after Sora, Donald, Goofy, and Jack Sparrow defeat Captain Barbossa.

Kingdom Hearts 358/2 Days

 * Goofy has Teamwork as his Limit Break.

Kingdom Hearts Birth by Sleep
The level 2 finisher of the  strongly resembles Teamwork.