I found out today that apparently Earthbound for SNES had built in anti-piracy protection against cartridge copiers back in the day. Apparently this game had Region Protection and many SRAM checks to see if the cartridge had only 8KB of ram.
If the SRAM checks fail during game play, the game will increase in difficulty substantially to almost impossible to beat. Quite clever might I say from the developers for almost 20 years ago.
Has anyone heard of other SNES games that employed similar measures? I just find all this quite fascinating.