From StrategyWiki, the free strategy guide and walkthrough wiki

AlphaDream Corporation
Founded	January 12, 2001
Founder(s)	Tetsuo Mizuno
Located	Tokyo, Japan
Website	http://alphadream.co.jp/
Wikipedia has more about this subject: AlphaDream Corporation

AlphaDream Corporation is a Tokyo-based video game development team, founded in 2001. It was formerly known as Alpha Star. As a second-party developer for Nintendo, it has produced software for the Game Boy Color, the Game Boy Advance and the Nintendo DS. Some of their key employees are former employees of Square.

Software produced

Game Boy Color

• Koto Battle: Tengai no Moribito (Japan only)

Game Boy Advance

• Tomato Adventure (Japan only)
• Mario and Luigi: Superstar Saga
• Hamtaro: Rainbow Rescue (Japan and Europe only)
• Hamtaro: Ham-Ham Games

Nintendo DS

• Mario and Luigi: Partners in Time
• Hamtaro: Ham-Ham Challenge
• Tottoko Hamutaro Haai! Hamu-Chans no Hamu Hamu Challenge! Atsumare Haai! (Japan only)
• Mario and Luigi RPG 3 (released in Japan in 2009, American and European release date is unconfirmed)
• PostPet DS (Japan only)