you can also hold l+r+down+b or quit via the in-game menu (l+down+select by default) in ds(i) games, in which it may or may not take you back to twilight menu++
also i will be playing trough a flash card if that makes a difference (after looking up modding DSi, i didn't rly like that and i think ill prefer keeping the console unmodded, only using a flashcard)