Mario & Luigi: Partners in Time

Mario & Luigi: Partners in Time is a 2005 role-playing video game developed by AlphaDream and published by Nintendo for the Nintendo DS. It is the second game in the Mario & Luigi series, following Mario & Luigi: Superstar Saga (2003). The story follows Mario, Baby Mario, Luigi, and Baby Luigi as they search for Princess Peach, who has been abducted by an alien species known as the Shroobs. Gameplay centers on cooperation between the quartet, who must use their specific qualities and skills to solve puzzles to progress. The game features multiple role-playing game elements and a turn-based battle system focused on timing accuracy.

Nintendo revealed Partners in Time at E3 2005. Key staff who worked on Superstar Saga returned, including producers Shigeru Miyamoto and Tetsuo Mizuno as well as composer Yoko Shimomura. The game narratively serves as a sequel to Superstar Saga, but the plot is unrelated to that of its predecessor, with more emphasis on the time-traveling theme, which involves the protagonists traveling in between the past and present of the Mushroom Kingdom.

Mario and Luigi: Partners in Time received generally favorable reviews. Critics praised its characterization and comical style, as well as its use of the DS's dual screen and the rumble feature, although the use of the bottom screen in the overworld and battles received mixed opinions. The game was followed by Mario & Luigi: Bowser's Inside Story in 2009. Partners in Time was re-released for the Wii U's Virtual Console in 2015.