Soo, I started playing my brothers Pokémon Pearl lately, and he has a Wi-Fi thingy and I was wondering if someone could tell me how to set it up, I have NO idea on how to do it.
You have to use the main screen of the DS (not the actual game). Go into options or some such, then go to Wi-Fi. Enter your wireless network information. Blam, you're done.

S t a i r s s r i a t S