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Arm Rotor

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Arm Rotor
ROB Side B SSBU.gif
Arm Rotor in Ultimate.
User R.O.B.
Universe R.O.B.

Arm Rotor (アームスピン, Arm Spin) is R.O.B.'s side special move.


This attack makes R.O.B. spin around rapidly with outstretched arms. The attack also grants R.O.B a bit of horizontal lift, allowing it to be used to aid R.O.B.'s recovery a bit (though this is rarely necessary). It deals minor damage (normally 4%), hits multiple times, and has decent stun and knockback. This attack can also reflect any incoming projectiles that hit the outstretched arms. The move can be a bit difficult to use as a reflector, as there is bit of delay before R.O.B. starts to spin his arms, thus requiring more accurate timing than other, faster reflectors. Finally, it can be extended by mashing the special move button. If R.O.B. moves left or right while performing this move, his torso will also bend.

In Super Smash Bros. 4, the move ends with an uppercut that deals increased damage and knockback. The spins also trap enemies more reliably, allowing the entire move to combo well into the final hit. However, the move was still slow and highly punishable, with its KO power being limited.

The move was dramatically improved in Super Smash Bros. Ultimate, where the move now starts more quickly, and is active for less time overall, making the move slightly harder to punish. The move’s window of frames which reflect projectiles was extended, and the KO potential of the finishing blow was increased significantly, making Arm Rotor a devastating KO move when used off stage, especially when directly following up a thrown Gyro or forward aerial.

Instructional quote[edit]

Super Smash Bros. Ultimate Move List ROBHeadSSBU.png Hops forward with an arm-spinning attack. Can also reflect projectiles.


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

1. Arm Rotor 2. Reflector Arm 3. Backward Arm Rotor
"Hop forward with an arm-spinning attack. Can also be used to reflect projectiles." "A longer arm spin that makes it easier to reflect projectiles. No forward movement." "Spin opponents around while knocking them away. Its slow start leaves you open to attacks."
  1. Arm Rotor: Default.
  2. Reflector Arm: Knocks away foes, doesn't hit as often, and is unable to move, but lasts longer and reflects projectiles with a 1.8x damage multiplier.
  3. Backward Arm Rotor: Hits less and has an incredibly short spin, but the uppercut comes out much quicker and the move is also able to combo into itself. Can stop projectiles and certain attacks. Note that the description says it has a slow start, but it doesn't.


The original R.O.B. peripheral reaching for a Gyro. Screencapped from an AVGN video, actually.
The original R.O.B. peripheral rotates its arms to grab a Gyro.

The move is an original creation; however, the spinning animation is similar to R.O.B.'s victory pose in Mario Kart DS. The R.O.B peripheral in real life could also rotate its arms, albeit at a much slower pace than Arm Rotor.


Names in other languages[edit]

Language Name
Japan Japanese アームスピン, Arm Spin
UK English Arm Rotor
France French Bras rotor
Germany German Rotorobo
Spain Spanish Rotor
Italy Italian Rotazione
China Chinese (Simplified) 旋转臂
Taiwan Chinese (Traditional) 旋轉臂
South Korea Korean 암 스핀, Arm Spin
Netherlands Dutch Armrotor
Russia Russian Ручной ротор, Manual rotor


  • Even when metal, the graphical effects of the Arm Rotor will still correspond with the arm color of R.O.B.'s palette.