The plot of Super Mario World is detailed in the instruction booklet. After bringing peace to the Mushroom World in Super Mario Bros. 3, the brothers Mario and Luigi decide to go on vacation with Princess Toadstool to a place called Dinosaur Land, a prehistoric-themed world swarming with dinosaurs and other enemies. While resting on the beach, Princess Toadstool is captured by Bowser. When Mario and Luigi wake up, they try to find her and, after hours of searching, come across a giant egg in the forest. It suddenly hatches and out of it comes a young dinosaur named Yoshi, who tells them his dinosaur friends have also been imprisoned in eggs by Bowser's kids, the evil Koopalings. Mario and Luigi soon realise that Bowser's forces must have captured Toadstool as well. Mario, Luigi and Yoshi set out to save Toadstool and Yoshi's dinosaur friends, traversing through Dinosaur Land for Bowser and his Koopalings. To aid him, Yoshi gives Mario a cape as they begin their journey.

Mario and Luigi continue to follow Bowser, defeating the Koopalings in the process, and save Yoshi's Yoshi friends. They eventually arrive at Bowser's Castle, where they fight him in a final battle. They send Bowser flying into the sky and save Princess Toadstool, restoring peace to Dinosaur Land.

Credits

Distributor: Nintendo
Designer: Shigeru Miyamoto, Shigefumi Hino
Director: Takashi Tezuka
Producer: Shigeru Miyamoto
Programmer: Toshihiko Nakago
Composer: Kōji Kondō 

Development

Nintendo EAD