Arm Rotor

Arm Rotor is R.O.B.'s Side Special Move. The attack causes R.O.B. to spin with arms outstretched. The also attack lifts R.O.B. into the air slightly, allowing it to be used to aid R.O.B.'s recovery slightly. 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 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 the other faster reflectors. Finally, it can be extended by rapidly tapping 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. for Nintendo 3DS and Wii U, it now ends with an uppercut that does increased damage and knockback.

R.O.B. using Arm Rotor in Brawl

R.O.B. ending the Arm Rotor with an uppercut in Wii U/3DS.

Custom Variations

Reflector Arm

Reflector Arm is one of R.O.B.'s Side Special Moves that can be used via customizations. R.O.B. does a spin that lasts longer and with increased damage and knockback. The move can easily reflect projectiles, however, it can score only one hit.

Backward Arm Rotor

Backward Arm Rotor is one of R.O.B.'s Side Special Moves that can be used via customizations. R.O.B. does a quick spin and ends with a fast uppercut. It's very hard to reflect projectiles.

R.O.B. using Reflector Arm.

R.O.B. ending the Reflector Arm with an uppercut.

R.O.B. using Backward Arm Rotor.

R.O.B.'s Custom Special Moves
	Custom 1	Custom 2
Standard Special	Wide-Angle Beam	Infinite Robo Beam
Side Special	Reflector Arm	Backward Arm Rotor
Up Special	Robo Rocket	High-Speed Burner
Down Special	Fire Gyro	Slip Gyro

Origin

Rotating his arms and opening his hands were the only functions R.O.B could do to interact with games possibly serving as the inspiration of the fast paced Arm Rotor.

R.O.B.'s Special Moves
	Brawl	3DS/Wii U	Ultimate
Standard Special	Robo Beam
Side Special	Arm Rotor
Up Special	Robo Burner
Down Special	Gyro
Final Smash	Diffusion Beam	Super Diffusion Beam	Guided Robo Beam