You may have seen this video.
Well, the little helmet dude can take punishment from more than just Megaman. (Note that these videos are based on a totally different series of Megaman games than the other video.)
That boss, Falzar, is considered somewhat weaker-in fact, there are videos of it getting thrashed by another boss. Which boss? Gregar, which the little helmet dude takes on in this video.
And now you know... that little helmet guys can apparently kick most guys around pretty badly.
(And yes, obviously I know they're not called "little helmet guys." Frankly, I don't give a care.)