The ROB peripheral was a short lived gimmick, BUT helped Nintendo release the NES in the US and onto world domination.
From what I read, retailers were reluctant to carry any more videogame systems, especially after the Atari disaster. The only way stores could carry consoles is if they were sold as toys. So Nintendo bundled the NES with the ROB accessory and called it at toy. This worked as they began selling the system, and the rest as they say is history.
Fans see him as being vital in the NES's life, despite being very short lived.
...Oh, this is the Funhouse.
Well, ROB does suck. I don't need to play Brawl to know that!