Nobody's mentioned Lode Runner: The Legend Returns/Mad Monks' Revenge?
Come to think of it, I'm strongly convinced that the music in TLR/MMR is perfect as it is, but what the hey, I'll take a shot at it.
gonna try remixing this:
Lode Runner: The Legend Returns/Mad Monks' Revenge: Crystal Hoard
with which I have the strong desire to mash up with the Pokemon G/S/C Dark Cave theme for some reason.