From GameBrew - a wiki dedicated to Video Game Homebrew.
Connect4DS is a port of connects 4 strategy board game on the NDS. Use ingenuity to defeat your opponent, either a friend or the CPU.
Place the pieces in the hole from bottom up, try to connect 4 pieces in a row before opponent to win.
According to the developer, the CPU is not quite ready and is rather easy to defeat.
Stylus - Choose between CPU or Friend (menu)
Stylus - Place the chips
Tested on Games n 'Music (DLDI v2.0 firmware 1.3).