I remember when DSi was out on japan, some guys started to try to hack it... I first saw Yasu's helloworld, then some guys using fake commercial cards... But I remember one guy using an homebrew... Interface was like the "TTDS fake checker" => plain black with black text on top. It was called "DSTT Adv cart tester" or something like this. 1:You put a flashcard on you DS/DSi. 2:You run this homebrew. 3: you remove your flashcard. 4: You put another one. 5: Press A: It boots (and on the video was actually a DSi, running perfectly old TTDS/U2DS). Does someone remember this video (I saw it on youtube), have a link for this app? Or maybe it could be interesting to develop this kind of homebrew.