I just bought a controller attachment for my smartphone so I can replay Crystal and Emerald! I haven't tried any of the 3D games yet, do they still hold some of the charm that the 2D games had?
But I ordered the new Pocket Taco, which is like a controller that is taco-shaped and clamps around your smartphone, kinda turning it into a gameboy.
Nokia's N-Gage was a taco shaped smartphone before its time!