The Mobile GB Adapter, also known as the Mobile Adapter GB (Japanese: モバイルアダプタＧＢ) is an obscure gaming peripheral for Nintendo's Game Boy Color, Game Boy Advance and Game Boy Advance SP systems.
The Mobile GB Adapter would connect to a service known as Mobile System GB via Japanese mobile phones in which it could be used for various online services such as sending and receiving email (through software such as "Mobile Trainer" that was originally packaged with the peripheral) or paid online battles in the Japanese version of Pokémon Crystal.
The only Sanrio related game that officially supported the Mobile GB Adapter was Hello Kitty no Happy House for the Game Boy Color where the service was used to send mail and furniture.
- ↑ Archived page of Iwata Asks: Personal Trainer Walking, mentioning the peripheral as the "Mobile GB Adapter"
- ↑ Rikkyjp's Mobile GB Adapter plaza