Castle Bowser

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Not to be confused with Bowser's Castle.
Castle Bowser
Render of Castle Bowser from Super Mario Bros. Wonder
Applies to Bowser
Item needed Wonder Flower
Appears in Super Mario Bros. Wonder (2023)
“Ohhh ho ho ho... Isn't this fun! The Flower Castle is me, and I'm the Flower Castle! Soooo much Wonder power! I can feel myself getting stronger...and stronger...AND STRONGER. Soon, everything will be mine! Gwahahaha!”
—Castle Bowser, Super Mario Bros. Wonder

Castle Bowser is a form that Bowser takes on in Super Mario Bros. Wonder, and serves as the main antagonist of the game. The form is the combination of Bowser, his Koopa Clown Car, and the Flower Castle (Prince Florian's castle), created when Bowser comes into contact with a Wonder Flower in the game's opening cutscene. He has a green, round body with his face all across the front and lime green horns at the sides. Atop is an altered version of the Flower Castle with a top section resembling Bowser's head, albeit with the hair piece being significantly enlarged.

After his transformation, Castle Bowser travels across the Flower Kingdom wreaking havoc, imprisoning Poplins in their houses by turning them into fortresses, and stations in the center of the Petal Isles.

When six Royal Seeds are collected, Castle Bowser invites Mario and his friends onto him to face four more challenges, concluding with a final boss fight against him, with Bowser taking on the form of the head of the castle on top. After the game is completed, Bowser, the Koopa Clown Car and the Flower Castle are separated.

Levels[edit]

As a location, Castle Bowser contains five levels, all of which are listed as Petal Isles levels.

Level Difficulty Primary power-up Wonder Effect Reward(s)
Missile Meg Mayhem level thumbnail
Missile Meg Mayhem 		★★★ Bubble Flower Causes Missile Megs to fly from various directions and leave colorful trails of smoke behind them Wonder Seed×2
High-Voltage Gauntlet level thumbnail
High-Voltage Gauntlet 		★★★★ Bubble Flower Transforms the player into their Metal form Wonder Seed×2
Evade the Seeker Bullet Bills! level thumbnail
Evade the Seeker Bullet Bills! 		★★★★ Elephant Fruit Forms a ship made of blocks with a cannon that travels across poison Wonder Seed×2
KnuckleFest Bowser's Blazing Beats level thumbnail
KnuckleFest Bowser's Blazing Beats 		★★★★ Elephant Fruit Causes the characters to strike a pose, and starts "Bowser's Blazing Beats" Wonder Seed×2
The Final Battle! Bowser's Rage Stage level thumbnail
The Final Battle! Bowser's Rage Stage 		★★★★★ Fire Flower Combination of past Wonder Effects Royal Seed

Profiles[edit]

  • Trading card bio: With a touch of the mysterious Wonder Flower, Bowser merged with Prince Florian's castle to spread chaos across the Flower Kingdom.

Gallery[edit]

  • Dialogue icon

    Dialogue icon

  • Castle Bowser having transformed in the opening cutscene

    Castle Bowser having transformed in the opening cutscene

  • Castle Bowser as seen on the map of the Flower Kingdom

    Castle Bowser as seen on the map of the Flower Kingdom

  • Castle Bowser in the center of the Petal Isles surrounded by Cloud Piranhas

    Castle Bowser in the center of the Petal Isles surrounded by Cloud Piranhas

  • The heroes arriving inside Castle Bowser

    The heroes arriving inside Castle Bowser

  • Wonder Bowser inside Castle Bowser

    Wonder Bowser inside Castle Bowser

  • Promotional image featuring Castle Bowser, counting down three days to the game's release

    Promotional image featuring Castle Bowser, counting down three days to the game's release

  • Promotional image featuring Castle Bowser, counting down one day to the game's release

    Promotional image featuring Castle Bowser, counting down one day to the game's release

Names in other languages[edit]

Language Name Meaning Notes
Japanese 城しろクッパ[1][2]
Shiro Kuppa 		Castle Bowser
Chinese (Simplified) 城堡酷霸[3]
Chéngbǎo Kùbà (Mandarin)
Sìhngbóu Houhba (Cantonese) 		Castle Bowser
Chinese (Traditional) 城堡庫巴[4]
Chéngbǎo Kùbā (Mandarin)
Sìhngbóu Fubā (Cantonese) 		Castle Bowser
Dutch Kasteel-Bowser[5] Castle Bowser
French Fort Bowser[6][7] -
German Schloss-Bowser[8] Castle Bowser
Italian Bowser castello[9] Castle Bowser
Korean 성 쿠파[10]
Seong Kupa 		Castle Bowser
Polish Castle Bowser[11] -
Portuguese Bowser Castelo[12][13] Castle Bowser
Russian Боузер-замок[14]
Bouzer-zamok 		Castle Bowser
Spanish Bowser Castillo[15][16] Castle Bowser

References[edit]

  1. ^ Kai, editor (1 Sept. 2023). 「スーパーマリオブラザーズ ワンダー Direct」で最新情報を公開。クッパがお城と合体しちゃった？ 【ワンダーの世界へ Vol.1】. Nintendo Official Site (Japanese). Retrieved 7 Oct. 2023. (Archived June 18, 2024, 22:35:35 UTC via Wayback Machine.)
  2. ^ Kazuma, Sakurai, Sato Tomoya, Nakatani Itaru, Kojima Katsuyuki, and Hashiguchi Yuya (2023). 『スーパーマリオブラザーズ ワンダー かんぺき攻略本』. Tokyo: Kadokawa (Japanese). ISBN 4-047337-02-1. Page 3, 498.
  3. ^ 2025. 花洛里安王子和城堡酷霸 #72042. LEGO (Simplified Chinese). (Archived July 18, 2025, 17:35:57 UTC via Wayback Machine.)
  4. ^ 1 Sept. 2023. 公開《超級瑪利歐兄弟 驚奇》最新資訊。庫巴跟城堡合體了!?【前往驚奇的世界 Vol.1】. Nintendo Official Site (Traditional Chinese). Retrieved 7 Oct. 2023. (Archived January 17, 2025, 10:15:10 UTC via Wayback Machine.)
  5. ^ 2025. Prins Florian en Kasteel-Bowser #72042. LEGO (Dutch). (Archived July 9, 2025, 11:09:24 UTC via Wayback Machine.)
  6. ^ In-game displayed during dialogue from Super Mario Bros. Wonder (Canadian French). (Archived 21 Oct. 2023 via YouTube by KoopaTiph - Gaming Québec.)
  7. ^ In-game displayed during dialogue from Super Mario Bros. Wonder (French). (Archived 21 Oct. 2023 via YouTube by OcariKnights.)
  8. ^ „Während Schloss-Bowser Unheil anrichtet, muss die Reisegruppe aus dem Pilz-Königreich alles geben, um die Lage wieder ins Lot zu bringen!“ – 2023. Super Mario Bros. Wonder. Nintendo DE (German). Tab „Übersicht“. Retrieved 8 Feb. 2026.
  9. ^ «Con Bowser castello fuori controllo, tocca agli eroi del Regno dei Funghi lanciarsi in azione per riportare tutto alla normalità!» – 2023. Super Mario Bros. Wonder. Nintendo IT (Italian). Tab «Panoramica». Retrieved 6 Feb. 2026.
  10. ^ 1 Sept. 2023. 「슈퍼 마리오브라더스 원더 Direct」의 최신 정보를 공개. 쿠파가 성과 합체해 버렸다!? 【원더의 세계로 Vol.1】. Nintendo Official Site (Korean). Retrieved 7 Oct. 2023. (Archived July 10, 2025, 20:15:23 UTC via Wayback Machine.)
  11. ^ 2025. Prince Florian i Castle Bowser #72042. LEGO (Polish). (Archived July 19, 2025, 13:52:44 UTC via Wayback Machine.)
  12. ^ In-game displayed during dialogue from Super Mario Bros. Wonder (Brazilian Portuguese). (Archived 21 Oct. 2023 via YouTube by Tulio Akar e As Gatinhas.)
  13. ^ 2025. Príncipe Florian e Bowser Castelo #72042. LEGO (European Portuguese). (Archived June 1, 2025, 23:22:27 UTC via Wayback Machine.)
  14. ^ In-game displayed during dialogue from Super Mario Bros. Wonder (Russian). (Archived 16 Apr. 2024 via YouTube by MGAMES_TV.)
  15. ^ In-game displayed during dialogue from Super Mario Bros. Wonder (Latin American Spanish). (Archived 19 Oct. 2023 via YouTube by MR Games.)
  16. ^ In-game displayed during dialogue from Super Mario Bros. Wonder (European Spanish). (Archived 22 Oct. 2023 via YouTube by Freidan.)
[Edit]
Koopas
Characters Bowser, forms, and counterparts Alarm Koopa • Baby Bowser (Mega Baby Bowser) • Black Bowser • Blockhead Bowser • Bowcien • Bowser • Bowletta • Busō Koopa • Castle Bowser • Dreamy Bowser • Dry Bowser • Fury Bowser • Gahaha Daiō • Giant Bowser • Giga Bowser • Glohm Bowser • Golf Daiō • King Koopa's alter egos • King Tetris • Kinoko no Sei • Koopa 3 • MegaDragonBowser • Meowser • Molten Bowser • Mr. K • Paper Bowser • Poseidon Koopa • Qix Daiō • Shiny RoboBowser • Shrowser • Torino Daiō • Wonder Bowser
Bowser's current game relatives Dry Bowser • Bowser Jr. (Wonder Bowser Jr.) • Paper Bowser Jr.
Bowser's former game relatives Fake Bowser (Blue) • Koopa Kid • Koopalings (Iggy Koopa · Larry Koopa · Lemmy Koopa · Ludwig von Koopa · Morton Koopa Jr. · Roy Koopa · Wendy O. Koopa)
Bowser's adaptation relatives Bowser's mother • Enma Daiō • Ippa • Nippa • Zappa
Other Bowser X • C. Everett Koopa • Dark Bowser (Mario & Luigi: Bowser's Inside Story) • Dark Bowser (Super Paper Mario) • Darkmess Bowser • Francis Ford Koopola • Gary Koopa • James Fennimore Koopa • Kassanova Koopa • Koopa Daimyōjin • Uchū Keisatsu no Patrol Taiin • Uerubā
Species Impostor Bowser • Koopa Kid • Koopa Zombie • Tail Bowser
Facsimiles and other constructs Mechakoopas Blasta Mechakoopa • Darkmess Rabbid Mechakoopa • Fire Rabbid Mechakoopa • Flying Mechakoopa • Mecha-Bowser • Mecha-Bowser (Super Mario Galaxy) • Mechakoopa • Mega Mechakoopa • Micro Mecha-Bowser • Rabbid Mechakoopa • Zappa Mechakoopa
Other robots and mechs Bowser??? • Bowser's mech • Mecha Hand • Mecha Maker • Mekakuppa • Mini Bowser • Mini Bowser Jr. • Robo-suit • Super Mecha Koopa • The Great King Bowser
Statues Abominable Snowkoopa • Bowser Sphinx • Bowser Statue • Bowser Stunner • Flying battleship (Wonder Effect) • Guard Door • Koopa no Yukidaruma • Lava Bowser • Bowser Snow Statue • Papercraft Bowser • Papercraft Bowser Jr.
Buildings Bowser's Castle • Bowser's Galaxy Generator • Koopamart • Temple of Koopa
Vehicles Bone Rattler • Flame Runner • Gilded King • Holiday King • Koopa Cruiser • Koopa King • Silver King
Related items Bowser Bomb • Bowser Candy • Bowser Capsule • Bowser Suit • Bowser's Shell • Grand Spiky Shell • Koopa Kid Orb
[Edit]
Bowser forms
Main Big Dry Bowser • Black Bowser • Blockhead Bowser • Bowcien • Bowletta • Busō Koopa • Castle Bowser • Dreamy Bowser • Dry Bowser • Fury Bowser • Giant Bowser • Giga Bowser • Glohm Bowser • Molten Bowser • Mega Baby Bowser • Mega Bowser • MegaDragonBowser • Meowser • Metal Bowser • Shiny RoboBowser • Shrowser • Wonder Bowser
Other Alarm Koopa • Dark Hammer Slam Bowser • Hammer Slam Bowser • Heat Cannon (Mega Strike ability) • King Koopa's alter egos • Megaton Koopa Hō • Mushroom • Rookie • Scarecrow • Shroob mushroom • Tail Bowser
KC Mario Gahaha Daiō • Golf Daiō • King Tetris • Kinoko no Sei • Koopa Seven • Mr. K • Poseidon Koopa • Qix Daiō • Torino Daiō
[Edit]
Bowser's family
Forms and counterparts
Alarm Koopa • Baby Bowser (Mega Baby Bowser) • Black Bowser • Blockhead Bowser • Bowcien • Bowser • Bowletta • Busō Koopa • Castle Bowser • Dreamy Bowser • Dry Bowser • Fury Bowser • Gahaha Daiō • Giant Bowser • Giga Bowser • Glohm Bowser • Golf Daiō • King Koopa's alter egos • King Tetris • Kinoko no Sei • Koopa 3 • Magma Bowser • MegaDragonBowser • Meowser • Mr. K • Paper Bowser • Poseidon Koopa • President Koopa • Qix Daiō • Shiny RoboBowser • Shrowser • Torino Daiō • Wonder Bowser
Current in-game relatives
Dry Bowser • Bowser Jr. • Paper Bowser Jr.
Former in-game relatives
Fake Bowser (Blue) • Koopa Kid • Koopalings (Larry Koopa · Morton Koopa Jr. · Wendy O. Koopa · Iggy Koopa · Roy Koopa · Lemmy Koopa · Ludwig von Koopa)
Miscellaneous relatives
Bowser's mother • Enma Daiō • Ippa • Nippa • Zappa
Pets
Mechawiggler • Pookie • Ratso
President Koopa's relatives
Iggy • Spike
[Edit]
Super Mario Bros. Wonder / Super Mario Bros. Wonder – Nintendo Switch 2 Edition + Meetup in Bellabel Park
Playable characters Mario • Luigi • Peach • Daisy • Rosalina* • Co-Star Luma* • Yellow Toad • Blue Toad • Toadette • Yoshi • Red Yoshi • Yellow Yoshi • Light-Blue Yoshi • Nabbit
Forms Power-ups Small Mario • Super Mario • Fire Mario • Invincible Mario • Elephant Mario • Bubble Mario • Drill Mario • Flower Marioa*
Wonder Effect forms Hoppycat Mario • Goomba Mario • Balloon Mario • Spike-Ball Mario • Wubba Mario • Sproing Mariob • Puffy Lift Marioa • Metal Mario
Non-playable characters Prince Florian • Talking Flowers • Poplins • Angler Poplin • Master Poplin • Loyal Poplin • Professor Connect • Captain Toad • Hint Toad* • Ancient Dragon • Luma* • Baby Yoshi*
Enemies Anglefish • Armad • Baboom • Big Fiery Note Piranhaa • Big Fire Piranha Plant • Big Goomba • Big Hoppycat • Big Piranha Plant • Big Seeker Bullet Bill • Big Shoomp • Big Smogrin • Big Snootle • Big Trottin' Piranha Plant • Blewbird • Bloomp • Bob-omb • Bone Goomba • Bone Piranha Plant • Boo • Bull's-Eye Billet Train • Bull's-Eye Gnawsher • Bullet Bill • Bulrush • Buzzy Beetle • Castle Bowser • Cheep Cheep • Cloud Piranha • Condart • Condrop • Dry Bones • Fiery Note Piranha • Fire Piranha Plant • Fire Spike • Flying Mechakoopa • Gamboo • Gnawsher • Goomba • Goombrat • Hammer Bro • Hefty Goomba • Hefty Goombrat • Hefty Smogrin • Hefty Swirlypod • Hoppo • Hoppycat • Hothead • Kamek • Kerpop • King Boo • Konk • Koopa Paratroopa • Koopa Troopa • Lakitu • Lakitu trioa • Lava Blobble • Lava Bubble • Li'l Scorcher • Li'l Sparky • Maw-Maw • Mechakoopa • Melon Piranha Plant • Metal Gamboo • Missile Meg • Mumsy • Muncher • Ninji • Nipper Plant • Noknok • Outmaway • Piranha Plant • Pokey • Pokipede • Raargh • Racing Wiggler • Revver • Rift Koopa • Rift Mario • Robbird • Rolla Koopa • Rrrumba • Seeker Bullet Bill • Serpont • Shoomp • Shova • Skedaddler • Sluglug • Smackerel • Smogrin • Snootle • Snortoise • Spike • Spiny • Spiny Egg • Sproing • Swirlypod • Sugarstar • Taily • Thwomp • Trompette • Trottin' Bone Piranha Plant • Trottin' Piranha Plant • Urchin • Whohoo • Wonder Anglefish • Wonder Blewbird • Wonder Bloomp • Wonder Bulrush herd • Wonder Gnawsher • Wonder Hoppo • Wonder Hoppycat • Wonder Konk • Wonder Missile Meg • Wonder Piranhab • Wonder Shova • Wonder Smackerel • Wubba • Zip-Zap
Obstacles Bill Blaster • Bob-omb Cannon • Bowser statue • Bull's-Eye Blaster • Burner • Būsuke Hōdai • Electricity Block • Electricity Cloud • Fire Bar • Fire Knuckle • Fire Wheel • Fireball • Flying battleship (Wonder Effect) • Giant Spiked Ball • Honey • Hot-Hot Rock • Ice • Lava • Lava Geyser • Lava tide • Lightning • Mecha Maker • Moving torch • Ōgata no Burner • Piston • Pit • Poison swamp • Poison tide • Rift • Sand • Spike-Ball • Spike Trap • Volcanic debris
Bosses Bowser Jr. / Wonder Bowser Jr. • Koopalings* (Iggy · Larry · Lemmy · Ludwig · Morton · Roy · Wendy) • Bowser / Wonder Bowser
Items and power-ups 1-Up Mushroom • 10-flower coin • Badge • Big shell • Blue Coin • Bubble Flower • Buzzy Shell • Coin • Drill Mushroom • Elephant Fruit • Fire Flower • Flower coin • Hidden Coin • Jar • Key • Koopa Shell • Red POW Block • Royal Seed • Small flower coinb • Standee • Standee Surprise • Super Flower Pot* • Super Mushroom • Super Star • Swirlypod Shellb • Water • Wonder Flower • Wonder Seed • Wonder Token
Objects Blocks ! Block • ? Block • 10-Coin Block • Atchi Muite Block • Brick Block • Cactus box • Cloud Block • Crate • Donut Block • Dotted-Line Block • Empty Block • Hard block • Hidden Character Block • Icy block • Invisible block • Iron Block • Jewel block • Light-Switch • Linking Blockb • Linking Lift • Long Donut Block • Long Rotating Blocka • Marimba Block • ON/OFF Switch • Peanut box • POW Block • Pumpkin box • Race Block • Rhythm Block • Rock Block • Rotating Block • Roulette Block • Semisolid Blockb • Shoot ? Blockb • Shoot Block • Snow Blockb • Spring Blockb • Timer-Switch • Wonder POW Block • Yureru Block
Other objects ! Switch • ? Capsuleb • ? Switch • Aka-Ao Block • Akatō Lift • Arrow Sign • Beacon • Bomb • Bone Lift • Bridge • Bowser Switch • Bubble • Bumper • Cannon • Chandelier • Checkpoint Flag • Cloud • Cloud Lift • Coin blastera • Conveyor Belt • Cork • Current • Door • Dropdown Countdown Lift • Downpour Cloud • Fossilized dragon • Fune • Goal (Wiggler Race) • Goal Pole • Goal Pole (secret) • Goo • Handle • Hip Tree • Inchworm Pipe • Item Balloon • Jet Pipe • Key Door • Lakitu's Cloud • Large ! Switch • Lift • Lifting Shabon • Marui Ki • Mienai Ashiba • Mushroom Platform • Mushroom Trampoline • Oseru Ashiba • Oseru Dokan • P Switch • Pipe • Pole • Propeller Flower • Puffy Lift • Pump Lift • Rhythm Floorb • Semisolid Platform • Shikaku Trampoline • Sign • Sinkin' Pipe • Spotlight • Topple Rock • Totchī • Treasure chest • Triangoline • Ugoku Ashiba • Vine • Water tide • Wilted flower • Wow Bud • Zip Track
Locations Worlds Pipe-Rock Plateau • Fluff-Puff Peaks • Shining Falls • Sunbaked Desert • Fungi Mines • Deep Magma Bog • Petal Isles • Special World
Level types Badge Challenge • Break Time! • KO Arena • Search Party • Wiggler Race
Other Flower Kingdom • Bellabel Park* • Poplin Shop
Moves Boosting Spin Jump • Carry • Crouch • Crouching High Jump • Dash • Floating High Jump • Flutter Jump • Ground Pound • Jump • Looking up • Midair Spin • Slide • Spin Jump • Stomp • Swallow • Swim • Wall Jump
Gameplay elements Beat • Coin Heaven • Completion • Extra life • Player shadow • Secret exit • Sub-area • Wonder Effect
Music "Coast Theme" • "Doomy-Gloom Wonder" • "Grassland Theme" • "Medley-Mix Wonder" • "Poplin House" • "Snowy-Mountain Theme" • "Starry-Staff Wonder"
Further info Ask the Developer • Gallery • "Hop Chop Splat Oh-no! Song" • Multimedia • Nintendo Music (soundtrack) • Quotes • Staff
b Uses a derived name
* Exclusive to Nintendo Switch 2 Edition
Related Play Nintendo activities
All about Super Mario Bros. Wonder • Badge bunch
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