Nintendo won't confirm studio behind Mario & Luigi: Brothership, but says "original devs" are involved

Nintendo confirmed that "some of the original developers" who worked on the Mario & Luigi franchise are involved in the development of Mario & Luigi: Brothership4. However, they did not provide specific details about the individuals or the studio leading the project.

AlphaDream, the original studio behind the Mario & Luigi series, closed down on October 1, 2019, after filing for bankruptcy2. The company cited sluggish revenues and high development costs as the main reasons for its closure6.