I programmed it in to Guitar Pro 5 for distortion/overdriven guitar.
It's vastly inferior to what Killer Instinct on SNES/N64 was, but it does have a similar theme, and could indeed be from KI3.
It would seem, however, that the sheet music may be a rough pass, or have other instrumentation.
The sheet music's tempo seems a little too slow for what it should be...Speeding it up a little bit makes it close to KI.
The lead bit around bar 24-29 sounds very similar to KI.
If I had an electric guitar and mic nearby, I'd demo it, but it's not here. At any rate, it IS KI-esque, but very rough, as the notes aren't dynamic enough at the start to be a very good theme song.
http://www.youtube.com/watch?v=q7Fei7ro_aI
Edit: At 100BPM, it's VERY VERY similar to the KI Arcade sound track. This is either:
a) A fan making a very evil joke.
b) KI3's actual sound track.
Upping the tempo, and playing it on my accoustic guitar (even) sounds very similar to the theme in the youtube video I posted.
Back from the dead, I'm afraid.
