Hey, Xgen is a very good gaming site.
It is for flash games but I don't think its suited much for wii games; if you want to pause the game in a flash game you would just stop the keyframes for a while but its much harder to pause the game on an actual wii games as lots more values need to be 'stopped.'
So its an oppurtunity for flash/java/etc programmers with little Wii or home-console experience to try and make a bit more profit because more people could get a chance to play it if they didn't know about the website or something.
I'm not saying Xgen are bad developers though, Stick Arena is quite fun.