Hi there!
There is one Brazilian guy who is an authentic
Nintendo lover. His main hobbies are Tcheco,
his cartoon; and NES rom hacking!
He mainly do graphic upgrades in the games, but
sometimes he inserts his own characters at the
hack, introducing their mythology to gamers!
Check out his hacks at its page:
http://www.tcheco.com/mcbhacks/index.html
Ah!!! Have fun watching the commercial adds!!