As the name suggests, this plays in the Underground Reservoir area in the game. It's the obligatory cave/water section of Dracula's castle!
This is my first attempt at a non-SNES port, but I guess it doesn't really count because the GBA is somewhat similar to the SNES hardware-wise :P
Anyway, huge thanks to musicalman for his Samples of Insanity pack! That's where I got most of the samples I used here. And thanks to Pinci too, for helping me find a water SFX sample!
Warning: Incompatible with Blarggs and the Thunder SFX! Also, please don't use this for level 0/100, because the Bonus End jingle won't play correctly. I figured these two samples were fine to exclude since the song doesn't quite fit a lava (Blargg), dramatic/final (Thunder) or bonus level.