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Molten Fortress

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Link before the boss at the end of the Molten Fortress.

The Molten Fortress (溶岩城, Lava Castle) is a sub-world found in The Light Realm within Adventure Mode in Super Smash Bros. Ultimate. It is located in the north-central region above the Cliffside Rapids, and unlike other sub-worlds in the Light Realm, it does not require a certain type of Spirit to reach it. It is themed after the castle stages within the Super Mario series, and as such, P-Switches and Pipes are required for use in order to progress to the boss, Giga Bowser. The area's background music is Castle / Boss Fortress - Super Mario World / SMB 3.


The spirits found here are generally characters found in castles or ones associated with fire and lava. Spirits are ordered by when they are encountered on the map, up until the boss.

Spirit Battle parameters
No. Image Name Series Enemy Fighter(s) Type Power Stage Rules Conditions Music
SSBU spirit Mechakoopa.png
Mechakoopa Super Mario Series •Tiny Bowser Team BowserHeadYellowSSBU.png×4
3,800 Mushroom Kingdom U (Slide Lift Tower) N/A •The enemy starts the battle with a Bob-omb King Bowser - Super Mario Bros. 3
SSBU spirit Juste Belmont.png
Juste Belmont Castlevania Series Richter RichterHeadRedSSBU.png
4,200 The Great Cave Offensive (Battlefield form) •Hazard: Lava Floor •The floor is lava
•The enemy has increased move speed
SSBU spirit Leif (Fire Emblem).png
Leif (Fire Emblem) Fire Emblem Series Roy RoyHeadPinkSSBU.png
9,300 Castle Siege N/A •The enemy can unleash powerful critical hits at random
•The enemy heals over time
Fire Emblem Theme
SSBU spirit Shadow Man.png
Shadow Man Mega Man Series Greninja GreninjaHeadPurpleSSBU.png×3 (60 HP)
3,500 Norfair (Battlefield form) N/A •The enemy's neutral special has increased power
Stamina battle
•The enemy favors neutral specials
Shadow Man Stage
SSBU spirit Ho-Oh.png
Ho-Oh Pokémon Series •Curry Charizard CharizardHeadRedSSBU.png
13,900 Kalos Pokémon League (Blazing Chamber (Legendary) only) N/A •Fire and explosion attacks aren't as effective against the enemy
•The enemy breathes fire
Pokémon Gold / Pokémon Silver Medley
Artwork used for Twinbellow's Spirit. Ripped from Game Files
Twinbellows Kid Icarus Series •Giant Duck Hunt DuckHuntHeadTanSSBU.png
4,100 Find Mii (Ω form) •Curry-Filled •The enemy breathes fire
•The enemy is giant
Boss Fight 1 - Kid Icarus: Uprising
SSBU spirit Kamek.png
Kamek Super Mario Series Inkling Team InklingHeadCyanSSBU.png×4
3,300 Mushroom Kingdom U (Slide Lift Tower) •Easy to Launch
•Item: Star Rod
•All fighters are easy to launch after a little while
•Reinforcements will appear after an enemy is KO'd
•The enemy starts the battle with a Star Rod
Fortress Boss - Super Mario World
SSBU spirit Groudon.png
Groudon Pokémon Series •Giant Bowser BowserHeadRedSSBU.png
4,700 Norfair (Battlefield form) •Hazard: Lava Floor •The floor is lava
•The enemy is giant
Victory Road - Pokémon Ruby / Pokémon Sapphire
SSBU spirit Aisya.png
Aisya ASH: Archaic Sealed Heat Lucina LucinaHeadYellowSSBU.png
2,500 Bridge of Eldin (hazards off) •Assist Trophy Enemies (Shovel Knight)
Bob-omb Festival
•Bob-ombs will rain from the sky after a little while
•Hostile assist trophies will appear
Attack - Soma Bringer
SSBU spirit Lyon.png
Lyon Fire Emblem Series Robin RobinHeadWhiteSSBU.png
•Giant Ridley RidleyHeadPurpleSSBU.png
3,700 Unova Pokémon League (hazards off) N/A •Reinforcements will appear after an enemy is KO'd
•The enemy is giant
Preparing to Advance

Boss spirit[edit]

No. Image Name Type Class Slots Base Power Max Power Base Attack Max Attack Base Defense Max Defense Ability Series
SSBU spirit Giga Bowser.png
Giga Bowser
★★ 3 1655 6700 813 3289 692 2802 Fire Attack ↑ Super Smash Bros. Series


The boss of this sub-world is Giga Bowser. Defeating him grants players the Giga Bowser spirit, the partial destruction of Galeem's shield depending on the other sub-worlds defeated, and Bowser as a playable character.

Image Name Type Power Stage Music
Giga Bowser SSBU.png
Giga Bowser
??? Final Destination Giga Bowser

Captured Fighters[edit]

There are two fighters that can be freed within this sub-world. Both are from the Mario universe, and Bowser is required to free, as he is locked behind Giga Bowser. Peach is optional.

No. Image Name Type Power Stage Music
Peach SSBU.png
7,500 Mushroom Kingdom U Fortress Boss - Super Mario World
Bowser SSBU.png
Bowser There is no fighter battle for Bowser. This fighter is obtained after defeating Giga Bowser.


Two chests can be found in this sub-world.

Type Item Name Location
Music Track Melty Monster On the most-right path to Peach's location
Snack Snacks (L) ×2 Next to Lyon's spirit location

Names in other languages[edit]

Language Name Meaning
Japan Japanese 溶岩城 Lava Castle
UK English Molten Fortress
France French Forteresse de lave Lava Fortress
Germany German Lavaschloss Lava Castle
Spain Spanish Castillo de lava Lava Castle
Italy Italian Castello di Lava Lava Castle
China Chinese 熔岩城 Lava Castle
South Korea Korean 용암 성 Lava Castle
Netherlands Dutch Lavakasteel Lava Castle
Russia Russian Замок на вулкане Volcano Castle