During the Main Story, Mario and Cappy will have to find Power Moons in order to power up the Odyssey to travel from kingdom to kingdom. After the Main Story is completed, Mario can find and obtain additional Power Moons in order to unlock new Kingdoms and Costumes. In Moon Kingdom, there are 27 Power Moons that Mario can find during the Main Story. Some of these Power Moons will not be able to be found and obtained when first entering the kingdom; some Power Moons can only be obtained (even if listed below) after the main objectives have been completed in Moon Kingdom. (Even more will appear after the Main Story is completed.)
Moon Kingdom Power Moons & Mission Titles (Main Story)
Moon Kingdom Power Moon 01 - Shining Above the Moon
Moon Kingdom Power Moon 02 - Along the Cliff Face
Moon Kingdom Power Moon 03 - The Tip of the White Spire
Moon Kingdom Power Moon 04 - Rolling Rock on the Moon
Moon Kingdom Power Moon 05 - Caught Hopping on the Moon!
Moon Kingdom Power Moon 06 - Cliffside Treasure Chest
Moon Kingdom Power Moon 07 - Moon Kingdom Timer Challenge 1
Moon Kingdom Power Moon 08 - Taking Notes: On the Moon's Surface
Moon Kingdom Power Moon 09 - Under the Bowser Statue
Moon Kingdom Power Moon 10 - In a Hole in the Magma
Moon Kingdom Power Moon 11 - Around the Barrier Wall
Moon Kingdom Power Moon 12 - On Top of the Cannon
Moon Kingdom Power Moon 13 - Fly to the Treasure Chest and Back
Moon Kingdom Power Moon 14 - Up in the Rafters
Moon Kingdom Power Moon 15 - Sneaking Around the Crater
Moon Kingdom Power Moon 16 - Found on the Moon, Good Dog!
Moon Kingdom Power Moon 17 - Moon Shards on the Moon
Moon Kingdom Power Moon 18 - Moon Quiz: Amazing
Moon Kingdom Power Moon 19 - Thanks, Captain Toad!
Moon Kingdom Power Moon 20 - Shopping in Honeylune Ridge
Moon Kingdom Power Moon 21 - Walking on the Moon!
Moon Kingdom Power Moon 22 - Moon Kingdom Regular Cup
Moon Kingdom Power Moon 23 - Doctor in the House
Moon Kingdom Power Moon 24 - Sphynx's Hidden Vault
Moon Kingdom Power Moon 25 - A Tourist in the Moon Kingdom!
Moon Kingdom Power Moon 26 - Peach In Moon Kingdom
Moon Kingdom Power Moon 27 - Found with Moon Kingdom Art
Additionally, there will be 11 Post Game Power Moons that can be found and obtained in Moon Kingdom.