R.O.B. has very good moves both on ground and in the air. All his tilts are very fast moves with less knockback that should be used to push back and pressurize an opponent. The down tilt also has a chance to trip the opponent which is somewhat useful. His down smash is amazing and is always good to use, his forward smash is very strong, and he also has a strong up smash with somewhat limited range.
In the air, R.O.B can either approach with his forward air which is a very fast aerial with considerable knockback, or try to K.O. with harder to hit but more rewarding neutral and back aerials. The back aerial will be especially hard to hit with since it is a rocket move and it doesn't hit a wide area, but the neutral air hits all around him and sends the opponent far. His down aerial is also spike which is useful because R.O.B. can easily make it back to the stage after using it, as with any of his aerials.
Basic attacks
Wii Remote + Nunchuk
Wii Remote (sideways)
Wii Classic Controller
GameCube Controller
Standard Attack
Info
Smash +
++
(Smash +) or
(Smash +) or
Laser Attack
Fires a short-range laser burst in front of him.
Smash +
++
(Smash +) or
(Smash +) or
Upper flame attack
Fires a flame above him. Powerful, but doesn't hit ground enemies sometimes.
Smash +
++
(Smash +) or
(Smash +) or
ground spin
Spins his arms near the ground. Hits multiple times, last hit knocks enemy away
Special Attacks
Wii Remote + Nunchuk
Wii Remote (sideways)
Wii Classic Controller
GameCube Controller
Special Attack
Info
Robo Beam
Fires a more powerful shot when at full charge. Charges on its own. You can tell how charged it is by the diode on ROB's head, which is brighter after charging. Can pass through multiple characters, and aimed with the control stick.
+
+
+
+
Arm Rotor
If used properly it can deflect projectiles. Can be angled upwards or downwards by moving left or right.
+
+
+
+
Robo Burner
Same as Pit's Up-B but it uses a rocket engine to go up instead. Requires recharging after fuel depletes. Recharges by staying on solid ground for 1.5 seconds.
+
+
+
+
Gyro
Chargable projectile. Can be picked up after it is launched, but it spins, usually dealing damage to those who touch it, even after it lands.
Taunts
Wii Remote + Nunchuk
Wii Remote (sideways)
Wii Classic Controller
GameCube Controller
Taunt
It turns toward the camera and spins its head and torso in opposite directions.
+
( or )+
or
or
It turns toward the camera and emits several pulses of light from its eyes.
+
It turns toward the camera, and drops its torso, which then rises, spinning, back into place.
Final Smash
Diffusion Beam: R.O.B. fires a continuous beam from its eyes. Great for knocking an opponent off and guarding the edge. The cool thing about this move is that R.O.B. can use his other moves (besides Robo Beam) at the same time. So you can pull off some awesome combos with Gyros and Grabs. This Final Smash is not forever however so KO the enemies fast.
There's also a glitch where rob can jump into the bridge of eldin when it's broken and right as the bridge is forming, with good timing, you can use his Final smash FOREVER!