Yes, you need to go to options outside of the game and click set up wifi settings. If you sit near the router it should be pretty easy. Hope this helps.
yes
If you have a Wireless Router then yes, you can use a Wireless Router for accessing Wi-Fi features in Pokémon Diamond but if you are without a Wireless Router then you need to get either that or Nintendo's Wi-Fi USB Connector which will help you connect your DS to Wi-Fi features for Pokémon Diamond.
No, the Nintendo DS can only connect to Wi-Fi, which is Wireless.
It already has inbuilt wi-fi, you just need a wireless router for it to connect to.
Yes, Nintendo Wi-Fi is free and comes preinstalled on the system. You will only have to pay the monthly fee that you already paying for that internet.
Only if your computer has a wired connection instead of wireless. If you are using wireless, the DSi can connect to your router, it has its own wireless capabilities inside it. If you are not using wireless, you can buy a Nintendo USB wi-fi adaptor which plugs into your computer and turns it into a wireless hotspot that the DSi can connect to.
I can only think of a couple. If you have a wireless router or a Nintendo WFC USB Connector, you can use wi-fi at your home. The Nintendo World Store in Manhatten has NWFC access. Those I'm sure about. Maybe try any wi-fi hotspot. I don't think every hotspot is Nintendo WFC compatible, though.
The wirless router brand does not matter. If you have a wireless wi-fi network you can play online with it on your PS3. So yes, you can use online features with a cisco wireless router.
A Nintendo Wi-Fi Access Point is a Wireless Router connection that was set up to assist players in connecting online with online-enabled games.
Xbox 360S has a built in Wi-Fi adapter
For the purposes of a Nintendo Wii or DS, yes. You can hack the USB connector to allow any device, but this is naturally unsupported by Nintendo, and as such I will not explain it here. However, if you look through the sources on the Wikipedia article, you will find it there.
You would of course need an internet connection from a dsl or cable modem. If you have a laptop, you will need either a built in wireless connection or purchase a wireless card or usb device to pick up the router. If you have a desktop PC you will need to buy a wireless pci adapter or a wireless usb device to connect.