Chernabog

Chernabog is a boss from Kingdom Hearts. Based on a Slavic demon god, Chernabog entered Disney's universe in the Night on Bald Mountain segment of Fantasia. In Kingdom Hearts, Chernabog poses as the second-to-last boss in the game, being treated as the "boss" of End of the World (although the final boss is also battled there). It is also the last of the Disney characters to be battled, with the optional exception of the Ice Titan. It most suggests that at least part of End of the World is Fantasia's world.

Chernabog's role or motivation in Kingdom Hearts is debated as he never receives dialogue and is not mentioned in Jiminy Cricket's journal. Defeating him grants you the Super Glide ability.

Trivia

 * Originally, a North American- and European-exclusive feature to Kingdom Hearts was that Chernabog's boss music would be an excerpt from "A Night on Bald Mountain." This wasn't available to Japan until the Japanese-exclusive Kingdom Hearts: Final Mix was released.