Cheers

I've tried Shadow of the Colosus and Super Dragon Ball Z and they both work. My copy of the two games game are Pal format. Super Dragon Ball Z has Japanese voices that's why I bought it lol.
Usually if I plug it straight to my HDTV I won't get a signal or it would say unrecognized signal and the screen is blank. Through the HDBox I get a screen asking me to chose 50hz or 60hz.
I chose the 50 hz option and they both work perfectly.
So i'll assume it works with Pal games.
Mind you that my HDTV is North American HDTV running at 60hz though.
I'm gonna state that Pal games do diplay on the device fine.