Master Core

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Master Core is an optional boss in at least the 3DS version of Super Smash Bros. 4. Fought at the end of Classic Mode on Final Destination, it is formed from the fusion of Master Hand and Crazy Hand on high difficulties, should the player choose to fight them both.

On high enough difficulties (the exact range being currently unknown), once the Hands lose approximately 75 HP, they will leave the battle and merge into the Master Core entity. Master Core is a black mass of particles that takes on varying forms based on the difficulty and battle progression. It has HP, like other bosses, but it is hidden from the player.

Forms

Master Core begins the fight in a given form based on the difficulty. Once a form is defeated, it progresses to the next one.

Note that all names for the forms are currently unofficial.

Sapien

The Sapien form is a large humanoid creature. It appears as Master Core's starting form at Intensity 7.0 and up. It has the following attacks:

• Spawns 4 arms, two of them with glowing hands. These arms will sweep the stage. If the player is grabbed by a glowing hand, it will be consumed by the "head", taking damage and ending with a downwards launch.
• Slashes the screen horizontally. The slash itself does nothing, but after a brief a delay another slash will appear across the stage, dealing damage.
• Creates 6 electric orbs that fly and wander around the top part of the stage. Master Core will then briefly lift the stage, to the level of the orbs.
• Master Core's head will split open, creating a vacuum effect around it. During this, large electric orbs will travels across the stage horizontally. If the player is caught by the head, it will be "swallowed", taking damage then being launched downwards.
• Master Core's head will transform, then attempts to headbutt the player. If this attack lands, the player will be buried. After the headbutt, 4 orbs are created in a random area, detonating after a delay, creating a cross-shaped explosion.

Scorpion

The Scorpion form appears first on Intensity 6.0 to 6.9, or when the Sapient form is defeated. It has the following attacks.

• Jumps behind the stage, then bites the player. A rather quick attack.
• Leaps high off the screen, then comes back down with a body slam. It will land on either corner of the stage, and the stage briefly shakes when it lands.
• Spawns spikes on its back, then a trail of shadows will crawl across the ground. When its vertical position matches the player's or if it reaches the corner, spikes will spawn at that location, dealing damage.
• Emanates lightning around itself. There is a brief start-up time, which shows it being struck by lightning.

Sabres

This form can be encountered first on Intensity 5.0 to 5.9, or when the Scorpion form is defeated. It appears as a group of five swords, one larger than the others. It appears that any of the swords can be damaged equivalently. It has the following attacks:

• Launches two projectiles twice that boomerangs back to the Master Core. These projectiles can be absorbed with PSI Magnet.
• Similar to above, but launches two larger projectiles once instead.
• The swords space itself encompassing a large part of the stage. The four smaller swords will slash across the stage in a set pattern, then the large sword slams the ground, tracking the player.
• All five swords deal multiple slashes, ending with a big slash that knocks back the player. This attack has a very large radius, but each slash deals little damage and shield damage.

Simulacrum

In the penultimate phase, Master Core forms a copy of the player's character, slightly larger in size but otherwise equal. This form can be defeated either by depleting its stamina or by KO'ing it as with any normal character. It is encountered after defeating the Sabres form, and there does not seem to be a difficulty where this is the only form fought.

Source

Once the Simulacrum is defeated, the Core itself appears in the center of the stage as an object similar to a Smash Ball, and its percentage is now visible (starting at 0%). The player must now simply rack up its damage to KO it; there appears to be no challenge in doing so, as it has no attacks and the clock is stopped. If the knockback of an attack does not KO the Core directly, it simply returns to the center of the stage.

Gallery

• 

  Fusing from Master Hand and Crazy Hand

• Master Core Scorpion.png

  Scorpion form

• 

  Sabres form

• Master Core Kirby Simulacrum.png

  Simulacrum form fighting Kirby

• 

  Source form

• 

  Master Core being defeated

Trivia

• The way that the Master Core is a black mass that changes shape has similarities to the final boss of The Legend of Zelda: Link's Awakening, the Shadow Nightmares.
• During the battle the background music will occasionally go silent and a few quick beeps will play. Those beeps are morse code and spell out "Master Core".
• The Simulacrum form of Master Core is similar to the false characters in The Great Maze from Brawl's Subspace Emissary.
• If one compares Master Core's forms to Shadow Bugs, it can be presumed, if the Subspace Emissary is canon, that Master Core is a result of Shadow Bug corruption after Master Hand was controlled by Tabuu.