The Mobile Game Boy Adapter, known in Japan as the Mobile Adapter GB (Japanese: モバイルアダプタＧＢ) was a cable used to connect to mobile phones for the Mobile System GB service, with a Game Boy Color or Game Boy Advance. Some of its most popular uses were for the Japanese version of Pokémon Crystal Version, Mario Kart: Super Circuit and Mobile Golf.

The Mobile Game Boy Adapter was packaged with an application known as Mobile Trainer, which was used to configure the system and included the Mobile Home Page, a mailing system, and its special web browser. There is also a bundle which includes the adapter and Mobile Golf.

Here’s a full list of games supported:

  • Pokémon Crystal Version
  • Mobile Trainer
  • Monster Guardians
  • Napoleon
  • Play Novel: Silent Hill
  • Top Gear GT Championship
  • Doraemon: Midori no Wakusei Doki Doki Daikyūshūtsu!
  • Mobile Golf
  • Morita Shōgi Advance
  • Net de Get Minigames @100
  • EX Monopoly
  • Mario Kart: Super Circuit
  • JGTO Licensed: Golfmaster Mobile
  • Kinniku Banzuke ~Kongō-kun no Daibōken!~
  • Mobile Pro Baseball: Control Baton
  • Stacomi: Star Communicator
  • Zero-Tours
  • Game Boy Wars 3
  • ESPN Great Outdoor Games Bass 2002
  • Daisenryaku for Game Boy Advance
  • Mail de Cute
  • Hello Kitty: Happy House
  • beatmaniaGB Net Jam
  • Baketsu Daisakusen
  • Yu-Gi-Oh! Duel Monsters 5 Expert 1

This page and its part 2 document some of the history of the peripheral and also some efforts to emulate it in the modern era. There are great shots of the user interface that is no longer easily accessible.