From GameBrew - a wiki dedicated to Video Game Homebrew.
|PSP/DS Tic Tac Toe|
NDS Tic Tac Toe is a DS homebrew Tic Tac Toe which can be played on cross platforms, DS and PSP (two Versions), via Wifi.
Play over WiFi where IP address is hardcoded, but player can change it in the source.
Thanks to El_Hobito’s PA_Lib Wifi Setup App.