Near the
Mushroom Kingdom, a fabled land known as Vibe Island is said to hide a treasure known as the Vibe Scepter, a magical item that can be used to control the emotions of its user and others. Hearing of the island's legendary powers,
Bowser builds a summer getaway home on the island in hopes of using it to his advantage. After his second-in-command, Army Hammer Bro finds the Scepter for him, Bowser hatches a plan to capture the Mario Brothers. Army Hammer Bro. entrusts the scepter to a
Goomba and sends it into the castle. With the residents of the castle under the influence of the Scepter, the Army Hammer Bro. and his troops successfully capture
Mario,
Luigi, and many
Toads, imprisoning them all across the island. Goomba becomes influenced by the Vibe Scepter and begins swinging it around, causing Bowser and his minions to lose control of their emotions. Meanwhile, Princess Peach and
Toadsworth return to her castle after a short walk only to find the residents in emotional disarray and a note from Bowser saying that he has captured Mario and Luigi. Maddened with rage, Peach decides that she is the only one who can rescue the Mario Brothers and sets out to go to Vibe Island. Shortly before her departure, Toadsworth is reluctant to see Peach travel on her own, and gives her a sentient
parasol named Perry to help her on her journey. Peach and Perry travel through eight different areas across the island, rescuing various Toads and defeating enemies along the way. Because of the Goomba's earlier flaunting of the scepter, emotional energy had been dispersed all over the island causing the residents to experience various moods. Peach is affected but has better control, even gaining new abilities from each emotion. After defeating a boss and clearing the current area, Perry's backstory is revealed in
flashbacks: long ago, Perry was a young boy with magical powers whose earliest memories were in the woods on the mountainside of Vibe Island. He was adopted by an old man who he came to call "Grandpa". One day, Perry was confronted by a pair of enigmatic magicians who had seemingly heard of the boy's powers and transformed him into an umbrella. The wizard and his henchman captured Perry and brought him toward an unconfirmed location, but he managed to escape by wiggling free from his captors and fell onto the road. Some time later, a traveling merchant found him and sold him to Toadsworth. After defeating Giant Kamek and freeing Luigi, the duo arrive at Bowser's Villa where they meet Bowser and Army Hammer Bro. Bowser uses the Vibe Scepter to increase Army Hammer Bro's power with rage, but Peach bests him nonetheless. She then fights Bowser himself, and after his own defeat, the Koopa King uses the Vibe Scepter to turn into a giant, yet Peach and Perry defeat him again by throwing Bob-ombs at him, then whacking him out of the villa with the Scepter. After Bowser's final defeat, Peach frees Mario, they rejoice and return to the Mushroom Kingdom alongside Luigi and the Toads, with the Vibe Scepter left floating in space. ==Development==