are getting ready for dinner when their story comes on the news and the anchorman says they should be called the "Super Mario Bros." Daisy then arrives and asks the Mario Bros to help her on a new mission. Crestfallen, Luigi kisses Daisy goodbye as he and Mario return home to Brooklyn, with Daisy watching them leave. Luigi professes his love for Daisy and wants her to come to Brooklyn with him, but Daisy, have found her both home and father, decides to stay in Dinohattan. The citizens celebrate and immediately destroy anything with Koopa's likeness. Daisy's father is restored as king after Koopa's defeat. Koopa, now transformed into a ferocious, semi-humanoid Tyrannosaurus, attempts to kill the Mario Bros., but they destroy him once and for all by devolving him into an actual Tyrannosaurus rex, then primeval slime. In Dinohattan, Mario confronts Koopa and eventually defeats him when he and Luigi fire their devolution guns at Koopa and blast him with a Bob-omb.
rescue Daisy with the help of Toad, a good-natured guitarist who was devolved into a Goomba as punishment.Įventually, the two worlds merge and Koopa devolves Scapelli into a chimpanzee before going after Mario, but Luigi and Daisy manage to remove the fragment from the meteorite and the worlds separate again. Koopa informs Daisy that she descended from the dinosaurs, believing only Daisy can merge the worlds because of her royal heritage. Daisy is taken to Koopa-Tower, where she meets Yoshi. However, after Koopa subjects them to one of his experiments to make them more intelligent, Spike and Iggy realize Koopa's evil intentions and side with the Mario Bros.
Koopa sends Spike and Iggy to find Daisy and the rock to merge the dimensions and make him dictator of both worlds. The portal was then sealed, but Scapelli's men inadvertently reopened the portal when they blasted the cave. When Koopa overthrew Daisy's father as king and devolved him into fungus, her mother the queen took her to Brooklyn. It is then revealed that Daisy is the long-lost princess of the other dimension. Iggy and Spike realize they didn't bring Daisy's rock, a meteorite fragment which Koopa is trying to get in order to merge his world with the human world.