help please a really ds and wifi noob is here

okay...i know how to connect the ds online and all that crap but...i can only do that in the ''wifi settings'', since not all ds games have that option- including the ds menu - i'm having a small problem connecting the games that i like online.
it only worked perfect on 1 game.
how can i connect games online when they dont have wifi settings?

not all games support wifi.

Games that don't have any wifi options or menus aren't wifi enabled. List of Wifi enabled games http://en.wikipedia.org/wiki/List_of_Nintendo_DS_Wi-Fi_Connection_games