Original mashup was made by TKRMX. Check out the original here: https://soundcloud.com/tkrmx2/sets/mega-man-tkrmx. The original has nice beats and sound effects, but the clipping and out-of-tune vocals annoyed me.

Beastie Boys - Intergalactic
Quickman theme - Mega Man 2
Video: https://youtu.be/HE4C-GxOr10