You can, but my router is WPA and I'm not turning off security for a DS game. I'd say, on your to-do list, finish all of Sol's lessons, get to know the other students and get familiar with the game's features, such as what mushrooms grow at what times, mystery time, etc. On the 24th of every month, mystery time is automatically induced (it's great for money making, by the way, cause the fish and bugs are so valuable) and that scared me the first time cause the sky turned dark pink and dance of the sugar plum fairies was playing.