Mobile21
Japanese video game developer
title: "Mobile21" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["video-game-companies-established-in-1999", "defunct-video-game-companies-of-japan", "video-game-development-companies", "1999-establishments-in-japan", "nintendo-divisions-and-subsidiaries", "konami"] description: "Japanese video game developer" topic_path: "geography/japan" source: "https://en.wikipedia.org/wiki/Mobile21" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0
::summary Japanese video game developer ::
::data[format=table title="Infobox company"]
| Field | Value |
|---|---|
| name | Mobile21 Co., Ltd. |
| native_name | モバイル２１株式会社 |
| romanized_name | Mobairu21 kabushiki gaisha |
| type | Joint venture |
| industry | Video game |
| foundation | October 7, 1999 |
| defunct | December 14, 2002 |
| fate | Defunct |
| location | Asakusabashi, Tokyo, Japan |
| key_people | Masaki Yoneoka (president) |
| owners | |
| :: |
| name = Mobile21 Co., Ltd. | logo = | native_name = モバイル２１株式会社 | romanized_name = Mobairu21 kabushiki gaisha | type = Joint venture | industry = Video game | foundation = October 7, 1999 | defunct = December 14, 2002 | fate = Defunct | location = Asakusabashi, Tokyo, Japan | key_people = Masaki Yoneoka (president) | owners = | homepage =
was a Japanese video game developer that was a 50/50 joint venture between Nintendo and Konami established in October 1999. Mobile21 primarily concentrated on creating Game Boy Advance games, with a particular focus utilizing the mobile phone linking features of the Mobile Adapter GB accessory. The company was led by Masaki Yoneoka and its headquarters were located within Nintendo's offices in the Asakusabashi district of Tokyo.
History
On September 2, 1999, Nintendo and Konami announced the establishment of Mobile21, a joint venture focused on developing software for Nintendo consoles with network connectivity. As part of this initiative, Nintendo planned to release an adapter the following year to connect the Game Boy Color and Game Boy Advance to cell phones, enabling online interactions. The company also had plans to develop software for the future GameCube console.{{multiref2|1= |2= }}
Operations began on October 7, 1999, with an initial capital of , evenly split between Nintendo and Konami. However, each company retained only 15% of the stock, leaving 70% available to grant to employees in anticipation of an early public offering, part of an aggressive talent recruitment strategy.
The Mobile Adapter GB and the Mobile System GB service were unveiled at the Nintendo Space World event in August 2000. At the time, Nintendo planned to release them in December, however, delays establishing the service pushed the launch back to January 27, 2001, for a MSRP of .
The Mobile Adapter GB was not a commercial success, selling 80,000 units in its first year on the market, leading the Mobile System GB service to be discontinued after less than two years on December 14, 2002. The end of the Mobile Adapter GB also led to the end of Mobile21.
Games
Mobile21 produced twelve games during its time in existence, six of which used the Mobile Adapter GB. ::data[format=table]
| Name | Release date | Publisher | Platform | Notes |
|---|---|---|---|---|
| Monster Guardians | Konami | GBA | Mobile Adapter GB support | |
| Tanbi Musou: Meine Liebe | Konami | GBA | ||
| Doraemon: Midori no Wakusei Doki Doki Daikyūshutsu! | Epoch | GBA | Mobile Adapter GB support | |
| Net de Get Minigames @100 | Konami | GBC | Mobile Adapter GB support | |
| EX Monopoly | Takara | GBA | Mobile Adapter GB support | |
| Mobile Pro Yakyū: Kantoku no Saihai | Konami | GBA | Mobile Adapter GB support | |
| Jurassic Park III: Island Attack | Konami | GBA | ||
| Okuman Chouja Game: Nottori Daisakusen! | Takara | GBA | ||
| Gradius Galaxies | Konami | GBA | ||
| Mail de Cute | Konami | GBA | Mobile Adapter GB support | |
| Koro Koro Puzzle Happy Panechu! | Nintendo | GBA | ||
| AirForce Delta Storm | Konami | GBA | ||
| :: |
Notes
References
References
- Tam, Augie. (October 2000). "Fun 'n Games in the New Economy".
- "会社概要のペ".
- (April 2000). "モバイル２１株式会社".
- (October 2000). "Spaceworld 2000: The Dawn of GameCube".
- (August 24, 2000). "ゲームボーイによる携帯電話ネットワーク 「 モバイルシステムGB 」について".
- Harris, Craig. (October 31, 2000). "No Mobile Adapter Until 2001". IGN.
- (January 27, 2001). "Game Boy Mobile Adapter Delayed".
- Harris, Craig. (March 30, 2001). "Low Numbers for Mobile Adapter GB". IGN.
- Sledge, Ben. (August 13, 2022). "Pokemon Crystal Had Long Distance Trading Years Before The Nintendo DS". TheGamer.
- "タイトル".
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