You mean four players on each separate systems? I've been curious about why people don't try challenges for New Super Mario Bros. Wii. But I guess the game isn't based on a simple grid system like the old Mario games? I mean New Super Mario Bros. on the Wii would be pretty simple, it's really just the graphics that changed. But it's finding cannons on different levels that'd make it more of a hassle than going through pipes to finish the game. Y'know what? I just answered my own question. The new games don't link up as simple as the old ones. Does anybody have any other reasons they think this can or can't be done?