I'm pretty sure I know the problem but here it goes: When playing locally (Local play) with DSTwo, at some points the game (any game with local play, in this example its Mario Kart DS) hiccups up (brief freeze) off and on. My friend also gets it as well, rather we both play with a copy of the DStwo or just one. If it helps were both playing with 3DS, it almost seems to me that the 3DS wireless (for DS) is weaker then playing with the DSTwo on an actual DS/DSi. I have formated the mirco card enough times the correct way I'm sure its not the problem (playing Single player or on Nintendo WiFi I never get the brief freeze). If anyone has another solution I could try please let me know.