Jet Balloon
Jet Balloons are enemies from Kingdom Hearts: Final Mix.
Found only in Final Mix, a Jet Balloon is a green variant of the Aquatank enemy found in Atlantica (which, incidentally is not the similar blue color that it was in Kingdom Hearts, but instead red). They form a symbiotic relationship with Missiledivers, firing them to keep Sora away from it. Jet Balloons are found only in Neverland on the deck of Hook's ship. Also be careful when the Missiledivers charge at you. This cause you to lose a ton of munny. To avoid it, fly out of the way or defend against it with Aero.
Strategy
Jet Balloons are always flying away from Sora and launch Missiledivers when he begins to approach. They are also quick to vanish from the area, meaning it must be defeated quickly. A good way to do so would be to approach from below with Aeroga active to avoid being hit by Missiledivers while getting close enough to attack it.
