The Diffusion Beam is R.O.B.'s Final Smash. It is basically his Standard Special Move with some twists. R.O.B. shoots short-ranged whirling lasers out of his eyes, followed by some hard-hitting short lasers. Similar to the Superspicy Curry. R.O.B. can move freely during the Final Smash. Being in the general area in front of R.O.B. causes damage that rises at a 2% damage rate and as long as R.O.B. is in front of an enemy, he will continue doing damage. The short-ranged laser has decent knockback. However, as the move has such a short range, it is one of the most easily avoided Final Smashes. However, it lasts for a decent time and renders R.O.B. invincible for the duration, resulting in somewhat of a chaos as he chases opponents around the stage, trying to catch them in the deadly vortex of his eye beams. He can also use his entire moveset (minus a few special moves) during the Final Smash.
Trivia
- For some strange reason, this Final Smash is the only one that was not described on the DOJO.
- R.O.B. is the only character who can benefit from the Bridge of Eldin Final Smash glitch, giving him a never ending Diffusion Beam. Although, in order to make this happen, the player ust have R.O.B. get caught in the re-materialization of the Bridge during the close-up animation that starts the beam. If the player does it at any other time, R.O.B. will merely take damage, and waste the time of the Final Smash.
