via http://emu-russia.net/en/

Nintendo GameBoy Advance emulator for Android has been updated. Changes:
- Implemented network play! This feature is still experimental, but proven to work in F-Zero and Pokemon games.
- In order to use NetPlay, select Connect NetPlay from the menu.
- To stop using NetPlay, select Disconnect NetPlay from the menu.
- Both players have to be on the same WiFi network, or use global IP addresses.
- Remember to save your game state before using NetPlay
News source: https://play.google.com