From GameBrew - a wiki dedicated to Video Game Homebrew.
AirHockey DS is a Air Hockey homebrew game with sound effects and AI (Artificial Intelligence) on NDS.
Beware of AI, because it returns all the shots with the intention of scoring, not just return them.
The game ends when one of the 2 reaches 10 points.
Stylus - Movement
A - Start game
Flashcard with firmware O.S. iPlayer 1.2 V 1.0.6
Supercard DSONEi Flashcard Evolution with firmware 1.0
Flashcard R4 with unknown firmware
TTDS Flashcard with firmware 1.17
Flashcard M3i Zero with firmware 4.7f
Once the game is over, you have to turn off the DS or restart to be able to play again.