Pokémon Crystal Version (lost Japan-only Mobile Adapter GB content for Game Boy Color role-playing game; 2001-2002)
Pokémon Crystal Version for Game Boy Color was released in Japan in 2000, and elsewhere in 2001. It took the story and gameplay of the earlier Pokémon Gold Version and Pokémon Silver Version and enhanced them, with storyline additions, graphical upgrades, and a few new game mechanics. However, while the gameplay was enhanced worldwide, nowhere was it more enhanced than in Japan.
In Japan, an accessory compatible with the Game Boy Color and Game Boy Advance was released called the Mobile Adapter GB. It could be used to attach a player's Game Boy Color or Game Boy Advance to their mobile phone, allowing them to connect to the Internet and engage in online multiplayer activities or download new content to their games. The Mobile Adapter GB was not released outside of Japan, likely due to the fact that at the time, cell phones outside Japan were neither as common nor as technologically advanced as those in Japan.
Pokémon Crystal Version was one of the several games compatible with the accessory. The Japanese version of the game has a Pokémon Communication Center (abbreviated PokéCom Center) in place of the Pokémon Center in Goldenrod City (international versions have much of this data intact and even translated, but unused). Using the Mobile Adapter GB, players could go to the PokéCom Center and battle and trade with other players across the nation using mobile Internet service. Downloadable content was also available. When data is downloaded, players can go to the PokéCom Center to receive it. DLC included items such as the GS Ball, Bluesky Mail, and Mirage Mail as well as news about other players who used the online service, viewable on the Pokémon News Machine. There were also a couple of exclusive minigames, including Chieko Dice and a ten-card quiz hosted by a time-travelling girl named Chieko. Dialogue for certain NPCs would also change depending on downloaded updates. Most of these services had fees attached to them, with Pokémon News having a monthly fee of ¥100.
Additionally, the service could change the Battle Tower and data for timed mobile battles could be transferred to the Nintendo 64 game Pokémon Stadium 2 via the Nintendo 64 Transfer Pak.
The mobile service shut down on December 14, 2002, due to limited commercial success and low user traffic. This meant no new updates and access to DLC was impossible. The downloaded data is stored in the game's RAM, which is backed by a battery. Batteries of Pokémon games are known to drain relatively quickly, particularly Pokémon Gold, Silver and Crystal Versions due to the fact that the battery supports an in-game clock that is constantly running, even when the game isn't being used. This means that when the battery dies, the Mobile data is erased as well as the save data. This makes the possibility of any Mobile patches still existing on any cartridge very unlikely. However, there are attempts at emulating the Mobile Adapter GB and the protocol for that has been documented.
- Chuggaaconroy (found early Pokémon Platinum videos from YouTuber; 2008)
- PokéPark: Asari Taikai DS (lost "Pokémon" Nintendo DS Download Play game; 2005)
- Pokémate (lost inaccessible "Pokémon" Japanese mobile phone app; 2006)
- Pokémon Mystery Dungeon: Gold Rescue Team -Challenge the Gold Rank!- (lost South Korean promotional demo of Nintendo DS game; 2007)
- Pokémon Mystery Dungeon: Rescue Team (partially found official website content of Nintendo DS/Game Boy Advance games; 2006)
- Pokémon 2000 Adventure Game (partially found browser-based online game; 2000)
- Pokémon.com (lost online games from website; pre 2010-2011)
- Twitch Plays Pokémon (partially found footage of Let's Play channel; 2014)
- Pokémon Gold and Silver Versions (found early SpaceWorld '97 demo build of Game Boy Color role-playing games; 1997)
- Pokémon PC Master (partially found Japanese educational PC game; 2006)
- Pokémon Picross (found build of cancelled Game Boy Color puzzle game; 1999)
- Pokémon Pink Version (lost build of cancelled Game Boy role-playing game; existence unconfirmed; late 1990s)
- Pokémon Stars Version (lost enhanced Nintendo Switch port of "Pokémon Sun and Moon" Nintendo 3DS role-playing games; existence unconfirmed; 2017)
- Pikachu: DS Tech Demo (lost "Pokémon" Nintendo DS tech demo; 2004)
- Pocket Monsters 64 (lost build of unreleased "Pokémon" Nintendo 64DD role-playing game; 1990s)
- PokéROM (found "Pokémon" edutainment series; 2000)
- Pokémon Crystal Version at The Cutting Room Floor.
- Mobile Adapter GB information at Bulbapedia.
- Pokémon Mobile System GB information at Bulbapedia.
- Pokémon Communication Center information at Bulbapedia.
- Pokémon Crystal Version Mobile content preservation project at ASSEMblergames forums.
- Mobile Stadium information at Bulbapedia.
- Mobile Adapter GB information at Bulbapedia.
- Emulating the Mobile Adapter GB at Glitch City.
- PokéCommunity Daily's in-depth article on how the mobile system worked. Retrieved 31 Aug '19