I just playing Jump SuperStars (J) and Yoshi Touch and Go (U) - and both times I tried to play with my friend, his DS would act like it would work..... Both top and bottom screens turned white - the top screen displaying the Nintendo logo - and then it just froze on those screens. Nothing happened and he'd be forced to do turn off his DS. Mine DS would either stop as well or give me a message saying lost connection or the other person dropped out or isnt responding or whatever. I did manage to wirelessly play Sonic Rush with him - but he has a legit Sonic DS game, so it wasn't "download play", where I would have to send the game data to his DS for him to be able to play with me. Now, does anyone know what the problem might be? I believe trimmed the data on the Yoshi Touch and Go, might that be the problem? But for Jump Superstars, I put it on my micro sd card with the "safe" option, since the game wouldn't work with/on my M3 Lite otherwise.