Recently got this title. But i have a question...

For what is the Wi-Fi in Final Fantasy II DS? I don't seem to find a use for it... And how is it accessed?

When was FFII released for the DS?

I think he means FFIII...

Btw, the WiFi is used to send messages to people, but it's pretty worthless unless you want to do extra quests or get the Onion Knight job class.

Oops... one "I" missing, sorry.
If it's for sending messages, how do i acces it?
I need FC? Or is open?
And how i can do extra quests? Someting worthy?

You need Friend Codes, and for each of the extra quests you need to have a certain number of friends you've sent letters to (via Mognet - look for the Moogle in towns). You also need to send a certain number of letters to an NPC (eg. Topapa).