I know this may not be the answer you want but the wii can actually play gamecube games and has all the original pad and memory ports, and in it own right soft modded with just a sd card is a better emulation system that the raspberry pi, and it's probably cheaper £15-£20 In most 2nd hand stores and it's genuine nintendo hardware!!!!!! 240p capable.
I never touched my wii for years soft modded it added a crt bam! It's always getting use even to this day.
Only decent Gc emulator I know and that is dolphin and it uses a beefy pc to do it.
Dougie Lawson Fan club