IGN said:Today, the company revealed the game's new "Push" mode for multiplayer gaming. The goal of Push Mode is to clear two lines at a time to move the screen down and push opponents into the red zone. If players let their own blocks build up too high, it's game over for them. Push Mode will be supported in all of the Nintendo DS system's wireless multiplayer options, including the Download Play single cartridge option as well as the online mode using the Nintendo Wi-Fi Connection.
http://ds.ign.com/articles/686/686674p1.html