Animator Scott Falco has been posting a series of short clips to YouTube which features Mega Man taking on each of the six original Robot Masters, most of them in rather creative new ways (Guts Man, a little less so, but points for characterization). You can find the rest here (we'd embed, but it's been disabled on the rest), with a detour for the exceptional Bomb Man monologue (set before Guts Man, of course) here.
Or, you can just watch them all in one longer sequence in the recently-posted Newgrounds anthology. Just be warned of a little bit of NSFW text, if that's a problem for you.
Thanks for the tip, Nick!