Star Coins hidden on Level Sparkling Waters-5 “Dragoneel’s Undersea Grotto”.Star Coins hidden on Level Sparkling Waters-4 “Urchin Shoals”.Star Coins hidden on Level Sparkling Waters-3 “Above the Cheep Cheep Seas”.Star Coins hidden on Level Sparkling Waters-Ghost House “Haunted Shipwreck”.Star Coins hidden on Level Sparkling Waters-Tower “Giant Skewer Tower”.Star Coins hidden on Level Sparkling Waters-2 “Tropical Refresher”.Star Coins hidden on Level Sparkling Waters-1 “Waterspout Beach”.Star Coins hidden on Level Layer Cake Desert-Castle “Morton’s Compactor Castle”.Star Coins hidden on Level Layer Cake Desert-Secret “Piranha Plants On Ice”.Star Coins hidden on Level Layer Cake Desert-6 “Blooming Lakitus”.Star Coins hidden on Level Layer Cake Desert-5 “Dry Desert Mushrooms”.Star Coins hidden on Level Layer Cake Desert-4 “Spike’s Spouting Sands”.Star Coins hidden on Level Layer Cake Desert-Tower “Stoneslide Tower”.
Star Coins hidden on Level Acorn Plains-4 “Mushroom Heights”.Star Coins hidden on Level Acorn Plains-3 “Yoshi Hill”.Star Coins hidden on Level Acorn Plains-Tower “Crushing Cogs Tower”.Star Coins hidden on Level Acorn Plains-2 “Tilted Tunnel”.Star Coins hidden on Level Acorn Plains-1 “Acorn Plains Way”.Note: This Star Coins hunt is worth the effort, because collecting all of them in each of the 8 initial Worlds makes sure you can unlock the paths to the overworld levels and mushroom houses! That makes this collectible a requirement to get 100% completion in New Super Mario Bros.