The music from Spongebob: Battle for Bikini Bottom. Oh my. Even though it's a Spongebob game, the music is amazing.
https://www.youtube.com/watch?v=gnXc4k0jNGw
https://www.youtube.com/watch?v=mSzjxulx1cE
https://www.youtube.com/watch?v=nrUt7BoJFcw
https://www.youtube.com/watch?v=3KDinwCfvcg
The first 2 are level themes, the last 2 are boss themes.