Alas, Accordion Hero is just a parody — it’s just a clever idea that’s been given it’s own website.
However, that doesn’t mean that someone hasn’t built an accordion-style for Guitar Hero-type games. Ladies and Gentlemen, I’d like you to meet Oded “SoundGuy” Sharon and the game controller that he created by hacking a toy accordion. Here’s a photo of Oded playing Frets on Fire (a Free Software version of Guitar Hero) with his “Accordion Hero” controller:
You can find out more about the controller in this entry on his blog.
Oded, you’re a true Accordion Hero — I salute you with a filet mignon on a flaming sword!