Thanks for sharing Yusei...
But what Ronald did was play the theme music on the piano mix with some few scratch repetitive keys.
I once had a Guitar class lol, and I learned some few notes back on my days. I'm also well familiarized with musician instrument and manage to play each of of them lol.
The sub music uses in the piano, are usually found from games like Mario and all, and also he was just having lol. Should observe before commenting he's a genius!!
Meaning it's like what webmaster did on his Ps2 games. I never noticed that the song I liked from his vid was One Winged Angel, yet it matches the game's fighting mode sound and everything...