On your iPhone open up Safari then type in the search bar m.coolrom.com and then it gives an assortment of Emulators to download and then you can download roms off CoolRom's website. IF you want the MLP roms I will tell you how to add those.
True- but I prefer the traditional hardware. They just plain work right... RetroArch and PPSSPP still aren't even perfect. Seems like all of the games I really wanna play have some hiccups still. Silent Hill Origins for instance still has that annoying flashlight bug