The stage is based on several areas from the Paper Mario series, and its layout shifts between three versions in a pop-up book style.
The starting variation is based on Hither Thither Hill from Paper Mario: Sticker Star. It features a windmill that will spin under a heavy player's weight and a pipe that pushes anyone standing on it into the air. Near the end of this variation a fan appears in the background and generates a strong wind which blows away several stage elements and pushes fighters to the right of the stage.
The second variation is based on the S.S. Flavion, a ship from Paper Mario: The Thousand-Year Door. The ship may be accompanied by a giant Blooper, a recurring boss in the series: it does not directly interact with the stage, but it does form waves in the water that can carry players. Another possible occurrence is the appearance of the Whale from the original Paper Mario, which raises the ship with water spouting from his blowhole. This stops the ship's rocking and carries it closer to the upper blast line.
The last variation is Bowser's Sky Castle from Paper Mario: Sticker Star, which features a large bust of Bowser's head plus two floating platforms that move up and down on either side. The head's eyes will occasionally glow to denote what it does next: Red means it will start spinning, making it hard to stand on, and white precedes the head's jaw clamping shut, which deals moderate damage and knockback to anyone inside it.
After a while, the scene switches back to Hither Thither Hill and the cycle repeats.
Hither Thither Hill comes from Paper Mario: Sticker Star. In that game, Mario had to use the Fan sticker to access the windmill since the sails were blocking its entrance. When he used the sticker, a cutscene played where several nearby obstacles were blown away. When used in battle, the Fan sticker would blow all enemies around.
The S.S. Flavion appeared in Paper Mario: The Thousand-Year Door, where it was the ship of Flavio. During Chapter 5, Mario and his party had to use it to sail to Keelhaul Key. After several days of sailing, they were ambushed by several Embers. The ship wrecked on Keelhaul Key, and its scraps were used to set up camp on the island.
Large Bloopers are recurring bosses in the Paper Mario series, most notably in the first three. The specific Blooper bears a strong resemblance to the one fought in The Thousand-Year Door.
The Whale from Paper Mario, who was used to take Mario to Lavalava Island, makes an appearance, using his water spout to lift the S.S. Flavion a notable distance above the water. The background is the same one from Riverside Station in Chapter 6.
Bowser's Sky Castle comes from Paper Mario: Sticker Star. Here, Mario and Kersti face off against Bowser in the final fight.
|Super Mario universe|
|Characters||Mario (64 · Melee · Brawl · 3DS/Wii U · Ultimate)|
Luigi (64 · Melee · Brawl · 3DS/Wii U · Ultimate)
Princess Peach (Melee · Brawl · 3DS/Wii U · Ultimate)
Bowser (Melee · Brawl · 3DS/Wii U · Ultimate)
Dr. Mario (Melee · 3DS/Wii U · Ultimate)
Rosalina & Luma (3DS/Wii U · Ultimate)
Bowser Jr. / Koopalings (3DS/Wii U · Ultimate)
Piranha Plant (Ultimate)
|Side Characters||Bosses||Metal Mario · Metal Bros. · Petey Piranha|
|Assist Trophies||Waluigi · Hammer Bro · Lakitu and Spinies · Chain Chomp · Thwomp · Flies & Hand|
|Mii Fighter Costumes||Mario · Luigi · Princess Peach · Daisy · Wario · Waluigi · Chain Chomp · Spiny · Shy Guy · Super Mushroom · Toad · Geno · Builder Mario · Cappy|
|Background characters||Koopa Troopa · Banzai Bill · Goomba · Pidgit · Toad · Boo · Toad Brigade · Chain Chomp · Luma · Pauline|
|Stage Hazards||Piranha Plant · Banzai Bill · Birdo · Shy Guy · Shellcreeper and Sidestepper · Kamek · Nabbit|
|Enemies||Goomba / Giant Goomba · Koopa Troopa / Koopa Paratroopa · Bullet Bill · Banzai Bill · Bill Blaster · Chain Chomp · Flame Chomp · Hammer Bro. · Lakitu and Spinies · Magikoopa · Shy Guy · Spike Top|
|Stages||Peach's Castle · Mushroom Kingdom (Super Smash Bros.) · Princess Peach's Castle · Rainbow Cruise · Mushroom Kingdom (Super Smash Bros. Melee) · Mushroom Kingdom II · Delfino Plaza · Mushroomy Kingdom · Figure-8 Circuit · Luigi's Mansion · Mario Bros. · 3D Land · Golden Plains · Paper Mario · Rainbow Road · Mushroom Kingdom U · Mario Galaxy · Mario Circuit · Super Mario Maker · New Donk City Hall|
Mushroom Kingdom (Adventure)
|Items||Banana Peel · Bob-omb · Boomerang · Bullet Bill · Fire Bar · Fire Flower · Freezie · Golden Hammer · Grass · Green Shell · Hothead · Lightning Bolt · Metal Box · Poison Mushroom · POW Block · Red Shell · Soccer Ball · Spiny Shell · Super Leaf · Super Launch Star · Super Mushroom · Super Star|
|Music||Lists||List of Music (Mario series) · List of Music (Mario Kart series)|
|Songs||"Main Theme (Super Mario 64)" · "Paper Mario Medley" · "Rainbow Road Medley" · "Jump Up, Super Star!"|
|Collectibles||Trophies||Melee Trophies · Brawl Trophies · 3DS Trophies · Wii U Trophies|
|Stickers||List of Stickers (Super Mario series)|
|Spirits||List of spirits (Mario series)|
|Masterpieces||Super Mario Bros. · Super Mario Bros. 2 · Super Mario Bros.: The Lost Levels · Super Mario World · Super Mario Kart · Dr. Mario|
|Related universes||Donkey Kong · Yoshi · Wario · Wrecking Crew|