“Welcome to the sun-drenched tropical paradise of Isle Delfino! We're so pleased to welcome you to our beautiful home! Come enjoy a natural wonderland to which we've added the world's finest resort facilities, a spectacular amusement park, and succulent seafood! This and more await you on Isle Delfino! Come relax and let us refresh your body and spirit.”
Isle Delfino is a tropical paradise island and vacational resort inhabited by Piantas, Nokis, Yoshis, Sunflower Kids, and Tanookis. Alongside the smaller Pinna Island, it looks like a dolphin, as indicated by its name, which means "dolphin" in Italian, and is a direct reference to the GameCube's preproduction codename, Project Dolphin. Isle Delfino is the main setting of Super Mario Sunshine, and has since reappeared in many spin-offs, including the Mario Kart series.
 Super Mario Sunshine
Mario, Peach, Toadsworth and some Toads take a trip to Isle Delfino in Super Mario Sunshine. However, the island had been covered in graffiti by the mysterious Shadow Mario, who the people think is Mario. With the help of the water pack F.L.U.D.D., Mario is forced to get rid of all the paint on the island and clear his name by defeating the imposter that has been causing trouble. Shadow Mario turns out to be Bowser Jr., who soon kidnaps Peach, but after Mario defeats him and his father, Bowser, life on the island returns to normal and Mario, Peach and their friends enjoy the rest of their stay on Isle Delfino.
 Mario Kart series
Isle Delfino has appeared in four of the Mario Kart games with new courses and stages based on it.
In Mario Kart: Double Dash!!, a course named Peach Beach was introduced, which took place on the shore of Isle Delfino. After the player completed the Grand Prix, the award ceremony was held there. Mario Kart DS featured a new course called Delfino Square, which takes place in autumn instead of the usual tropical weather. In Mario Kart Wii, both these courses returned in the Retro cups, along with a new battle stage called Delfino Pier, which likely takes place in the docking area of Delfino Plaza. A new track named Coconut Mall takes place on Isle Delfino. Coconut Mall then returned in Mario Kart 7 as a Retro track.
 Other games
Locations on Isle Delfino are shown in a couple of Mario Party minigames. Mario Power Tennis includes both the Delfino Plaza Court and the Gooper Blooper Court, which is set in Ricco Harbor. Delfino Plaza is also one of the boards in Itadaki Street DS and Fortune Street. Isle Delfino are one of the courses in Mario Golf: Toadstool Tour and Mario Golf: Advance Tour, which resembles Gelato Beach and Bianco Hills. It is also one of the stages in Super Smash Bros. Brawl.
 Other locations
 Species of Isle Delfino
 Protectors of Isle Delfino
 Enemies of Isle Delfino
 Names in Other Languages