Bowser's Kingdom

Bowser's Kingdom is a location in Super Mario Odyssey. The thirteenth world in the game, it is the home of Bowser and the greater location of his castle. Unlike other games, Bowser's Castle has strong Japanese influence.

Areas

 * Third Courtyard (Front):
 * Third Courtyard (Rear):
 * Second Courtyard:
 * Souvenir Shop:
 * Main Courtyard Entrance:
 * Main Courtyard:
 * Outer Wall:
 * Inner Wall:
 * Beneath the Keep:

Power Moon Locations
There are a total of 45 Power Moons in Bowser's Kingdom.
 * 01: Infiltrate Bowser's Castle!:
 * 02: Smart Bombing:
 * 03: Big Broodal Battle:
 * 05: Behind the Big Wall:
 * 07: From the Side Above the Castle Gate:
 * 08: Sunken Treasure in the Moat:
 * 09: Past the Moving Wall:
 * 10: Above the Poison Swamp:
 * 11: Knocking Down the Nice Frame:
 * 27: Fishing(?) in Bowser's Castle: Obtained by capturing a Fishin' Lakitu and fishing Poochy in the Poisonous Water around the Beneath the Keep area.

Multi Moon Locations

 * 04: Showdown at Bowser's Castle:

Enemies

 * Goombas
 * Pokios
 * RoboBrood (boss)
 * Stairface Ogres

Regional Coin locations
There are a total of 100 Regional Coins to be found in Bowser's Kingdom: It is recommended to beat the boss first before hunting these coins. If you missed the coins in your first run, some of them are easier to get by backtracking through the Sparked Pylon. The guide and the video linked here takes advantage of that.

Starting Area / Odyssey - 4 coins
 * 4 coins: Go through the entrance door and climb the roof to find the coins

Third Courtyard (Rear) - 4 coins
 * 4 coins: Backtrack through the Sparked Pylon to reach the other side. The coins are in plain sight at the end of a roof

Second Courtyard - 21 coins
 * 4 coins: Backtrack through the Sparked Pylon to reach the other side. The coins are on the highest roof on the left
 * 4 coins: Backtrack through the Sparked Pylon to reach the other side. Capture a Fokio and then poke and flick your way up to the coins
 * 3 coins: Near the checkpoint flag
 * 3 coins: On the top of the roof on the left side
 * 3 coins: Near a group of Spinies
 * 3 coins: Obtained by capturing a Pokio and going up and to the back side of the wall where the coins are

Souvenir Shop - 13 coins
 * 4 coins: Backtrack through the Sparked Pylon to reach the other side. Hit the hidden question blocks on the wall on the left side to go up the roof. The coins are on the edge on the left
 * 3 coins: Backtrack through the Sparked Pylon to reach the other side. Capture a Pokio to climb up the highest roof where the coins are located
 * 3coins: Backtrack through the Sparked Pylon to reach the other side. Capture a Pokio and drop down a certain point to get the coins
 * 3 coins: On the roof of the Crazy Cap Shop

Main Courtyard Entrance - 3 coins
 * 3 coins: The coins are on the roof on the right.

Main Courtyard - 12 coins
 * 3 coins: Near the checkpoint flag on the roof (lowest point - right side)
 * 3 coins: Capture a Pokio and climb your way up to left side of the roof
 * 3 coins: Capture a Pokio and climb your way up the middle of the roof
 * 3 coins: Underwater

Outer Wall - 10 coins
 * 3 coins: Near the checkpoint flag. Capture a Pokio and drop down to where the coins are
 * 4 coins: Capture a Pokio and climb your way up to the wall
 * 3 coins: Capture a Pokio and climb your way up to the wall

Inner Wall - 6 coins
 * 3 coins:
 * 3 coins:

Beneath the Keep - 24 coins
 * 3 coins: Drop down to the left side of the roof. The coins are on the floor beneath the roof. Wall jumping is required to get the coins
 * 3 coins: Drop down to the left side of the roof. The coins are on the floor beneath the roof.
 * 3 coins: Drop down to the right side of the roof. The coins are on the floor beneath the roof.
 * 3 coins: Drop down to the right side of the roof. Capture a Pokio, go through the group of Spinies and climb up the wall to find the coins
 * 3 coins: Capture a Lakitu on the right side and go under the bridge to find the coins
 * 3 coins: Capture a Sparked Pylon to go to the other side where the coins are located
 * 3 coins: Capture a Sparked Pylon to go to the other side where the coins are located. Drop down the roof on the golden Bowser statue and go left to find the coins
 * 3 coins: Capture a Lakitu on the right side and go to the northwest corner

Showdown Arena - 3 coins
 * 3 coins: The coins are in plain sight. Go up the flag which has the coins

Trivia

 * Many ornaments strewn throughout the kingdom, such as the nobori and the chōchin, contain the kanji 寿, which means "long life". Some chōchin additionally contain the compound 空覇, literally meaning "celestial supremacy".
 * The kingdom's industry (hanafuda cards) may be a reference to Nintendo's origins as as a card company.