After Bowser gets hold of something called a magical Vibe Scepter, he kidnaps Mario and Luigi and heads back to his castle on Vibe Island with an emotional troop of minions in tow. Intent on rescuing the Mario Bros., Peach gives chase, only to find herself affected by the emotional vibes given off by the island. Using these newfound vibes to channel special abilities, she sets off to rescue Mario and Luigi.
- Bowser's finally gotten wise and kidnapped Mario, figuring that since he's the guy who normally does the rescuing, no one will be around to rescue him. He's in for a big surprise, though, because Peach is armed (with a parasol) and dangerous.
- Besides whacking Bowser's minions with her parasol, Peach can channel emotional vibes into special abilities: floating through the air when she's happy, burning through bridges when she's mad or making vegetation grow with her tears.
- Join the princess as she runs, jumps, floats and fights her way through eight worlds to where Mario's being held.