First off, coding the game has nothing to do with fixing Alola Photo Club. Well, the Repo that fix the Photo Club and the Pokemon League could be the one(I dunno which one though). Second, coding is complicated. You need to study some languages like C and C++ to make your own code. An average joe have to go to College(or High School in some places) to know more about the language. Lastly, you might need an actual modded 3DS to contribute this project though. So yeah.