The Stardust Fields are the border region between the Beanbean Kingdom and the Mushroom Kingdom. The place is a purple field that contains barrels and fallen stars, and the background is a night sky. It is the home, or at least the guard post, of the Starshade Bros. This odd place is mostly in the Beanbean Kingdom, but a little bit is in the Mushroom Kingdom called the Beanbean Borderlands. The Beanbean Borderlands is the first place that Mario and Luigi visit when Bowser's Koopa Cruiser crashes, and Stardust Fields is the first major world of the game. The two sides are separated by the Border Bros., who are similar to Hammer Bros.. To cross the border, travelers must complete a round of jump rope. Mario and Luigi can also return to do the Border Jump again in exchange for Hee Beans. However, once the Mushroom Side is crossed, there is no turning back.
Once in the Beanbean Kingdom proper, Mario and Luigi met the large Tolstar. The Mario Bros. had to free Bowser from Tolstar's cannon. Tolstar agreed to release them if they give him 100 Beanbean Coins. The Mario Bros. had to go to the fields and search for more Beanbean Coins. They also learned a couple of Bros. Attacks from the Starshade Bros.. But Tolstar had scammed them, and then attacks the Bros. Once they win, Sergeant Starshade comes back out, irritated by the noise of the battle. He light the cannon Bowser is in, and he goes flying off to unknown parts, later reappearing in Chateau de Chucklehuck.
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