Wikipedia
AlphaDream
is a Japanese video game development company founded in 2000 by Tetsuo Mizuno in Tokyo, Japan. It was formerly known as Alpha Star.
In partnership with Nintendo, it has produced software for the Game Boy Color, Game Boy Advance, Nintendo DS and Nintendo 3DS, including the Mario & Luigi series. The company's staff includes prominent former developers from Square, such as Chihiro Fujioka.