Bikini Bottom

Bikini Bottom is a world featured in the Kingdom Hearts Heroes Unite series, first appearing in "A Chain of Memories". It's based on the popular long-running Nickelodeon cartoon series, "SpongeBob SquarePants". It's also the first Non-Disney world that Mickey, Donald and Goofy visited and the one that'll become the most recurring. An underwater world inhabited mainly by anthropomorphic fish and other marine creatures. It's also home to the titular sponge and his friends and enemies.

Between The Journey Begins and A Chain of Memories
Bikini Bottom originated from the Paramount Quarter of the Non-Disney Universe. It was brought into the Disney Universe by Ursula with the help of Plankton

Character Design
For this world, the animal members wear airsuits, similar to what Sandy wears while the human member are turned to merfolk, similar to their transformations in Atlantica, with some exceptions.