It’s simply a pong game… The main puporse of that game was to make a multiplayer game on one DS. Supported modes:

1vs1 on 1 screen
1vs1 on 2 Screens (1 or 2 balls)
1vs1vs1 on 1 screen
1vs1vs1 on 2 screens

http://www.neoflash.com/forum/index.php/topic,4985.0.html