In The Hall of the Mountain King

In the Hall of the Mountain King is a song that was used in Dragon Kite, A Little Einsteins Halloween, The Good Knight and the Bad Knight from the Royal Fair for the derby race and The Secret Mystery Prize.

Season 1
Dragon Kite

A Little Einsteins Halloween

The Good Knight and the Bad Knight from the Royal Fair for the derby race

Season 2
The Secret Mystery Prize

Trivia

 * This and Flight Of The Bumblebee were used as the Theme Song of Adventures of Sonic the Hedgehog.
 * And this music is also used from a Halloween episode "Donald's Halloween Scare" in the House of Mouse episode "Halloween with Hades" and the movie "Mickey's House of Villains".