Animal Crossing: New Leaf - 5PM (Remix by Dezphos)
Chrono Trigger - Black Omen (Remix by Malcolm Robinson Music) (Was also slowed by about 50% I think?)
Pikmin - The Forest of Hope (Remix by Scruffy)
Donkey Kong Country - Aquatic Ambience (Remix by iSWM)
Donkey Kong Country 2 - Stickerbush Symphony (Remix by PPF)
The last two by DJ Okawari also have a version where I removed the vocals/mono sounds.
You can find the MP3s I used in the game here