Like the title says, the protagonist from the old Nintendo game "Kung Fu" fights against several other retro game characters. Oh, and Megaman dies a lot.

The music in the second stage is the now ubiquitous (on Japanese YouTube) Okkusenman theme. The original can be found here: http://jp.youtube.com/watch?v=XmaltChJnV0

The music during the Megaman (known as Rockman in Japan, hence the Rockmad parody title in the vid) part is from Japanese composer S.S.H. It's his remix of the Final Fantasy 6 boss music and can be downloaded off his website: http://www.ssh.ne.jp/ from the mp3 section.

I'll leave it to someone without a lif--I mean with more time than me to actually list every game that makes an appearance here. Some of the major players are listed in the tags.

And since I know someone is going to ask about what the Dragon Ball Z dragon says when he shows up, he offers the main character 3 choices: eternal life, world domination, or woman's panties. Guess which one our hero picks, equips, and later eats to get his full health back.