I remember playing around with a SNES flash cart a few years ago when I stumbled into a working SNES for $20. Earthbound was one of my favorite games as a kid, and it was the first one I went for. The cart had features I straight-up didn't understand, but proved useful for this specific game--the ability to disable SRAM banks being the big one. "Why would you ever need to do tha--oh."

EDIT: Hurrah! Parent comment is positive again!