Many controllers exist that clip onto your phone, like ones from Gamevice, GameSir and iPega. As well as that, there are clips you can buy or 3D print for controllers you might already own, like PS3 and PS4 controllers. 8bitdo also sell clips for the NES30 Pro/FC30 Pro, not sure about their other controllers.
Of course since most of the options out there have analog sticks, you're not only limited to GBA and earlier, N64 and PSX also work very well, and on more powerful devices, Dolphin also works well. PS2 is not quite there but Dreamcast should work well. Plus, a lot of Android games support controllers, and the ones that don't, you can use touchscreen emulation if you have a rooted device.
That's not a bad option, especially if you use it for other things besides just GBA emulation.
Personally, I really like the form factor of the OG GBA. Pair that with one of the new IPS backlit screen kits and an EZFlash Omega and optionally a rechargeable lipo battery kit and you have something good. But of course that's only good for GB(C) and GBA games, and NES if you don't mind kinda ugly scaling.
Also, many of the controllers designed to clip your phone onto also work like a normal controller over bluetooth or 2.4g RF with a PC, so they can be used for virtually any device, which is a big plus in my book.
Last edited by The Real Jdbye,
