well I said fox as far as the rapid firing of his armcannon goes it certainly wold be faster than samus'.
The taking for the vanquished foe's powers was one of mega mans great attractions. Other than that he had the ability to slide and a mega buster. But not much else by default.
Perhaps he could use rush for an up+special? but really what other things does he have in his arsenal that are originally his other than the basic rapid shot, the mega buster and rush?
(Note:I'm assuming we're talking about the original mega man not the X version)