I've run into a strange issue with my room mate's 3DS and Smash Bros. He's had the game since launch, and the 3DS for a few years, and never had ANY problems with the system. Now, his system has great difficulty reading the cart at all. It shows up momentarily, but disappears, or sometimes doesn't even do that. Things get interesting when I tried the cart in my system. It works perfectly in mine. Must mean that his system is at fault, right? Well, we try my cartridge in his system and... It works. His system will read ANY cartridge but his copy of Smash. Puzzled, I drag out another 3DS. It works. I drag out my last 3DS, which I bought a few weeks ago, and... it doesn't work... Does anyone have ANY idea what caused this to happen? Quite frankly I'm absolutely stumped. There was no damage done to either the system or the cart, latest firmware and everything. The only thing we haven't done is a System Format, but he's hesitant to do so.