A Look Back at Mobile System GB, Pokémon Crystal's Online Service

Equipped with the Mobile Adapter GB and a copy of Pokémon Crystal, Japanese owners were able to trade with people far away, long before the days of Nintendo Wi-Fi Connection. Find out what it was l…

Pokémon Crystal - Mobile System GB

A Look Back at Mobile System GB, Pokémon Crystal's Online Service, PokéCommunity Daily

How to Play Old Pokemon Games on Switch - Alvaro Trigo's Blog

Edge of Emulation: Mobile Adapter GB - Part 1

Pokémon Crystal Version (lost Japan-only Mobile Adapter GB content for Game Boy Color role-playing game; 2001-2002) - The Lost Media Wiki

Game Boy Color - A Quarter Century Of Colour Nintendo Handhelds

Mobile System GB - Bulbapedia, the community-driven Pokémon encyclopedia

Nintendo didn't add Pokémon in the Gameboy NSO, so I added it. :) : r/SwitchPirates

A Look Back at Mobile System GB, Pokémon Crystal's Online Service

Pokemon Gold / Silver / Crystal Version - GameSpot