I'm pretty sure I downloaded the song from VGMusic a LONG time ago, but I am not totally sure if I got it from there. I thought I remembered the file being called 'Battle Z' or something like that so I always thought it might have been from a DragonBall Z game, maybe from the 16 bit era but it's a midi file so it's hard to know...I went back to the DBZ game files there in the NES/SNES section and came up empty.
Here's a link to the song, if anyone knows what this is from that would be awesome.
http://picosong.com/ZrEC/#