Whirling Fortress

Whirling Fortress
Whirling Fortress in Super Smash Bros. 4
Users	Bowser Giga Bowser
Universe	Mario
Article on Super Mario Wiki	Whirling Fortress

“	Spin on the ground to launch opponents skyward, or do it to get back onto the stage.	”
—Melee's instruction manual

“	Get additional loft while airborne to make recoveries a snap.	”
—Brawl's instruction manual

“	Spin inside your shell, and hit foes with your spikes.	”
—Description from Smash for 3DS's foldout

Whirling Fortress, (スピニングシェル, Spinning Shell) often shortened to Fortress, is Bowser's up special move and triple jump, where he retreats into his shell and spins rapidly while damaging nearby. Known for the defensive and maneuvering attributes it adds to Bowser's game, it fills several holes in Bowser's otherwise slow metagame, being widely regarded as the only reason Bowser is playable competitively in Melee. It is similar in execution to Donkey Kong's Spinning Kong, being a move that causes the user to quickly spin around as a mostly-horizontal recovery. Several unique properties make it highly beneficial to play:

• It has very little start-up (5 frames), during which Bowser is invincible, and has relatively little cooldown lag.
• One cannot get shieldgrabbed if one cancels a Fortress directly into another.
• It hits throughout most of its animation (on the ground).
• It allows Bowser to move quickly and suddenly in one direction.
• It has high knockback on the ground, and inflicts high damage in the air (32% if all hits connect perfectly, though this was reduced to 19%-15% in Brawl).
• In Melee, it can be used to edgeguard quickly and efficiently. Fortressing off the side of a stage leads directly to an edgehog, known as Fortress hogging.

The above properties make Whirling Fortress a versatile move. It can also be used as a damaging and effective replacement to Bowser's quick but laggy roll. It can also be jump-canceled out of shield to discourage overly aggressive opponents. It can also be used to clank with an opponent's move with decent timing.

This special attack is shared by Giga Bowser, both in his boss appearance in Melee and in his playable appearance in Brawl and SSB4. It grants him multiple frames of invincibility, making it difficult to attack him out of the move. In Melee, Giga Bowser's Fortress also gave him much more vertical recovery when used in midair.

In SSB4, pressing the special button repeatedly during the move will give Bowser more height, like the Mario Tornado, and is capable of grabbing ledges from behind. As an attack, it now deals damage in multiple hits instead of a single hard hit, making its use as an out of shield option even more reliable as it can still trap opponents if they put their shield down early.

Customization

Special Move customization was added in Super Smash Bros. 4. These are the variations:

1. Whirling Fortress	2. Flying Fortress	3. Sliding Fortress
"Duck inside your shell and spin. You can move sideways while spinning."	"Spins high into the air but doesn't deal damage."	"Spin while sliding quickly to send opponents flying. Less vertical range."

1. Whirling Fortress: Default.
2. Flying Fortress: Increases vertical distance, to about twice the regular height, at cost of horizontal distance and damage dealt. Launches foes, only hitting once for about 5% damage (despite the game saying it does no damage). Synergizes well with Dash Slash, where the Claw can move Bowser horizontally and then Flying Fortress to go vertically. However, when using this move while taking knockback, it won't rise as high or at all.
3. Sliding Fortress: Increased horizontal distance, going as far as the entire stage of Battlefield. Only hits once, doing 6% damage and reduced knockback. Takes longer to start up than the default move, making it less useful as a quick out of shield option. Also has increased endlag as well.

Fortress hogging

Fortress hogging is a technique in Melee that allows Bowser to grab onto the edge after simply using his Whirling Fortress on the stage. Fortress hogging is performed by timing the Whirling Fortress so that the end of the animation allows Bowser to fall past the stage and in turn, grab on to the edge. However, on stages where there are sloped edges, like Yoshi's Story, Bowser will automatically Fortress hog onto the edge regardless of the position he is facing, given he is not facing away from the stage after falling.

Fortress hogging can be useful to quickly edgehog a recovering opponent, and allow Bowser to reach the edge faster than he normally would by walking or running.

Origin

In Super Mario Bros., Koopas retreat into their shells when jumped on, and can be used as an attacking spinning projectile when kicked, thrown, or jumped on again. In Super Mario Bros. 3, when the player jumps on any of the Koopalings, they will fly in the air inside their shell. Ludwig von Koopa had a move similar to Whirling Fortress in Super Mario World.

Despite the above, Bowser himself never used this move, and in fact was never seen retreating into his shell in any Nintendo-developed game prior to the move's debut in Super Smash Bros. Melee. Like the Egg Roll and Green Missile, however, the move's concept later led back into the Nintendo-affiliated Mario series starting with an appearance as Bowser's defensive power shot in Mario Power Tennis, and Bowser using shell maneuvers is now a somewhat common occurrence.

Gallery

• 

  Ludwig von Koopa's shell move in Super Mario World.

• 

  Whirling Fortress in Melee.

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  Whirling Fortress in Melee.

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  Whirling Fortress in Brawl.

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  Whirling Fortress in SSB3DS.

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  Flying Fortress.

• 

  Sliding Fortress.

Bowser's special moves

Neutral special	Fire Breath
Side special	Koopa Klaw	Flying Slam
Up special	Whirling Fortress
Down special	Bowser Bomb
Final Smash	—	Giga Bowser		Giga Bowser Punch