Pink Gold Peach, Metal Mario, Baby Rosalina and many others are racing in on a Mario Kart track, when suddenly, a weird portal opens. It makes a sound and the three of them disappear in it.
Later, they wake up in a weird purple castle, which seems to be completely abandoned. They see a few weird creatures similar to Toads, but purple, and find out they are called Shroobs. They have to flee the castle, and in fact the entire world of the past, by travelling over all of the areas searching for a time portal pieces to restore it.
The gameplay works similar to that of other RPGs, especially to that of the Mario & Luigi series. They have to fight enemies to gain experience points, and in all of the main areas awaits a boss in the end, who guards a piece of the time portal for some reason.
|Pink Gold Peach||One of the two main playable characters, who is designed to be more agile and defensive.|
|Metal Mario||The second playable character, who is more offensive.|
|Baby Rosalina||The character who helps explaining all functions in the game, who always drives her Biddybud kart for no apparent reason. She also keeps the player's items.|
The following characters were also confirmed to appear, although their role remains unknown;