R.O.B. has yet to be seen in playable form in any of the preview builds of Super Smash Bros. Ultimate, so what little can be guessed about the character can only be found in the official trailer. However, one bit of the trailer that caught the eye of people was R.O.B.’s down throw, which has a different grounded animation than in Super Smash Bros. for Wii U.
Using theory crafting, GimR has discussed the potential of the move in combos, and that it could potentially hold some dangerous and deadly chain grabs that could go from 0% to a lost stock very quickly.
Source: GimR’s Lab