SoundSwap: Mike Tyson’s Punch Out and Mega Man 2

What happens when you swap the sound effects and music from Mike Tyson's Punch Out and Mega Man 2 for the NES?  Pure, sparkling, awesomeness.

Also, this may be the nerdiest thing I have ever made.

Except for this, the first video in the SoundSwap series featuring Mario and The Legend of Zelda.