no. you do not need it to do the musical but if you want to download new pieces of music you need to use the Global Link, which uses Wifi.
because you need better wifi
You'll need the Access Point first and then you can get WiFi Connection. Search for a Access Point in the WiFi Connection Settings and look for one around in the house. (Usually by windows.) Once you do find one (that is unlocked) you can connect to it and you can use the WiFi.
cagada [Edited] You need to wait for Pokemon global link to be running first, and have wifi connection on your DS.
You need a Wifi Connection or Wireless Connection just like a Nintendo Wii
no you need an internet connection with WiFi
You need to go to a place with WiFi connection or get WiFi connection where you live.
well you only need wifi for oak's letter member card etc. at a distribution you just need mystery gift.
It's on the second floor of any Pokemon Center.
Go to the main menu and you will see mystery gift press it it will say get from friend, get wireless and get from Nintendo WIFI connection. You will need WIFI for this to get event Pokemon like shaymin, darkrai, and other Pokemon.
You need Nintendo wifi connection for your DS once you have it access the GTS then all you need to do is offer Pokemon or take someone else's offer and trade Pokemon with them.
You should be able to. All you need is to register your home WiFi/internet connection into your DS.
no the wifi connection doesn't cost but it need GPRS connection. The wifi works as booster to ur internet