This pretty sweet Sonic and the Black Knight boxart emerged last month, inadvertently revealing that Sega had a whole new "Storybook Series" planned for Sonic. It also sported the Nintendo Wi-Fi logo, but the exact nature of the game's online mode wasn't clear -- until now.For those of you hoping for online sword duels: sorry, that's not happening. Siliconera's Spencer discovered a listing for the game on the site of Japanese retailer Rakuten which revealed Wi-Fi play would consist of trading items (Black Knight has 200+ items for you to hunt down) and ... some kind of ranking system. As it stands, you'll have to wait a bit longer for your chance to impale fellow Wii owners on the pointy end of Excalibur.