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Sky Island is a golf course in Mario Golf: World Tour that takes place high in the air. As such, Para-Beetles and Jumbo Rays can be seen flying around the area, however, they do not serve as obstacles. This course is unlocked by completing the nine-hole One-On, One-Putt Challenge in the Castle Club. All holes are par 3 and have one tee box each. This course is par 54, like Congo Canopy, Golf Guru's Pitch and Putt and Elf's Short Course. Its music is a cover of the athletic theme from Super Mario Bros. 3.
Doing the One-On, One-Putt Challenge again and clearing all 18 holes will grant the player a Propeller Mario costume. The reward for succeeding in all Star Coin challenges for this course is a Diddy Kong costume.