AlphaDream developed the Paper Mario crossover Mario & Luigi: Paper Jam.
Released for Nintendo 3DS, Paper Jam combines the Mario & Luigi role-playing series with the Paper Mario universe. AlphaDream was the studio behind the Mario & Luigi games, including Superstar Saga, Partners in Time, and Dream Team, so it led the game's development and built its characteristic timed-input combat around Mario, Luigi, and Paper Mario.
Nintendo published the game, while Intelligent Systems—the developer traditionally associated with the Paper Mario series—oversaw production and offered advice. That division of responsibilities is the source of a common mix-up: Intelligent Systems was involved, but AlphaDream is credited as the developer. The crossover story begins when Luigi opens a book containing a paper world, allowing Paper Mario and paper versions of other characters to enter the regular Mushroom Kingdom. Paper Jam launched internationally in late 2015 and early 2016.