The former is a remake of DS entry Bowser’s Inside Story and the latter is a new side story that focuses on Bowser Jr., and Nintendo recently shared a promo for the RPG double whammy.
Two great tastes swirl together when Mario & Luigi: Bowser’s Inside Story + Bowser Jr.’s Journey hits Nintendo 3DS in Japan on December 27, followed by North America on January 11 and Europe on January 25.
Mario & Luigi: Bowser’s Inside Story + Bowser Jr.’s Journey - Story Trailer - Nintendo 3DS