Don't you think the base line in this theme sounds like it would fit right into Wario Land II or 3?
I have a feeling Kozue Ishikawa composed this piece...
Yeah, the bass does sound like it would fit well into a Wario game. Probably Wario Land more so than the others, in my opinion. The GameBoy doesn't really have a broad sound palette, though, so a lot of GB tracks could probably be regarded as sounding Wario Land-esque. For example, I beat Metroid II just recently. Some sound effects are ripped straight out of Mario Land 2, yet they don't sound terribly out of place.