App to Use Ipod Touch as Game Controller?

[Droidnation.]

I have an unrooted ATT GSIII and i recently bought the HDMI adapter for it. So I was planning on using my Wii controller when my phone is hooked up to the tv but I no longer have that option (long, boring story). Would there be any way of using an iPod Touch as a game controller (connect thru bluetooth and an app)? Just curious, I've never heard of anyone doing this but figured I would ask before wasting money on another controller. Also, would I be able to use the iPod Touch if my phone is rooted? Thanks.

 

[Droidnation.]

What about an app to turn an old phone (the original galaxy s, which is rooted to be specific) into a controller for an emulator? Would it be able to connect to my GSIII thru bluetooth?