Well I was PMed by Stealth Raptor, the Pikachu main and I fought his R.O.B. He won every match but the last one. The matches however were very close, though there were times he two stocked me. T-T Unfortunately for me, we went to stages that were bad for Ness. Then we went to Final Destination, Smashville and Brinstar, the one I finally beat him on. I'm not sure what to say about these matches. However, if you recover smart, you shouldn't have that bad of a time coming back to the stage. Actually it could be worse. Ask Stealth Raptor. He'll tell you how low I've gone and some how made it back.
Anyway, I absorbed lasers, reflected Gyros with the PSI Magnet, found out Ness' fair can stop R.O.B.'s Gyro dead in the air or simply catch it. The PK Thunder tail can also stop R.O.B.'s Gyro, too. I think so anyway. I'm not exactly sure if it stopped the Gyro dead in the air making it drop, but whatever. How many times are you going to do that anyway? R.O.B. can be easily gimped if he least expects it, but I'm not sure if I'd recommend it unless you know for sure he's not going to use his uair while recovering.
R.O.B. will use his up B and fair to push you off the stage. No point in trying to use your fair back on him when he does this. Your best bet is to probably air dodge. When he does knock you off the stage, use your PSI Magnet stall, air dodge, second jump and PKT2, if necessary, wisely. Failing to do this will just make it easier for R.O.B. to gimp you. Make sure you have your second jump especially. There were reasons I got two stocked simply because my second jump couldn't be used thus making me die early on in the match.
Keep in mind that R.O.B. has a good edge game. He can fire his laser or Gyro while guarding the edge. The match up is obviously in R.O.B.'s favor. But I'm not sure where it is. I only won one match and I'm not sure how good Stealth Raptor is, whether he goes to tournaments or not. I'd say I'm a decent Ness main. I know there are better Ness mains here. If anyone is up for the challenge against his R.O.B. to help out this match up, go ahead and see if you can do better than I did. Again, the matches were very close, but R.O.B. ended up winning anyway.