Is Wifi free for Nintendo DS?
It’s generally free, but sometimes places like coffee shops will make you pay. I generally don’t use the DS’ WiFi, but one time, my Dutch friend (when we were both in Korea) demonstrated to me that you could, indeed, play Mario Kart over the guesthouse’s wireless network with people all the way over in Japan! It was pretty cool. Good luck with your DS WiFi. You can buy a browser and a Game Boy Advance-style memory cartridge and do full web browsing and download things. I hope this was helpful.