Christmas Town

Christmas Town is an expanded part of Halloween Town added in Kingdom Hearts II, located through a door in the Hinterlands. Although it is a world of its own story-wise, it is recognized as a part of Halloween Town, as shown under the location title as the player proceeds through the areas.

As a special world, it represents the holiday of Christmas. Once a year, the ruler Santa Claus will travel throughout the universe to give presents to children named on his nice-list.

Oogie Boogie and The Experiment are fought here respectively during the first and second visits to Halloween Town.

Differences in Kingdom Hearts II Final Mix
In Kingdom Hearts II, the normal and battle music of Christmas Town were the same as Halloween Town. However, in the Final Mix version, Christmas Town gained new pieces: What A Surprise! and Happy Holidays!, respectively.

Also in the Final Mix version, Sora, Donald and Goofy lose their Halloween Town garb and gain Christmas-themed forms instead. Sora retains his vampiric form but the garb is replaced by a black Santa suit. Unlike Sora, however, Donald and Goofy completely lose all traces of their Halloween Town forms, becoming a snowman and reindeer, respectively.

Relation to Nightmare Before Christmas
This world briefly appears in the original film. It functions much the same as it does in Kingdom Hearts II guiding Jack to find a change in holiday spirits. Even the portal functions the same as in the movie.

Trivia

 * When entering the Christmas Town portal there are other holiday doors that can be seen outside of the portal. Example: An easter egg door can be seen.