I like your Sonic dNES, but as others have said, you should tilt more XD. I think as general advice to Sonic mains, substitute fsmash with ftilt at lower percentages. I can recal at elast a couple of time where if you had ftilted ather than fsmashed, you would have connected, not to mention that tilts set up for grabs easily.
Rob is a character I generally am not as grab happy as I may be with other chars, probably because of their tendency to spam Spotdodge>Dsmash, although this Rob wasn't very crazy about that.
Your biggest weakness in this matchup IMO was when it came to fighting in the air. In the ground you handled him well, but his nairs seriously hit you hard, and you had troubles offstage. I would recommend not using homing attack for recovery whenever you'r opponent is offstage, only use it if your opponent is standing on the main platform as a quick way to recover. This is to reduce the risk of being hit out of your HA, something that's especially risky in this matchup thanks to ROBs Nair. The most important thing is to ger back up on stage; I often saw you try to attack ROB, and then get on stage, when your primary concern should just be recovering, especially since Jonbe has a strong gimp game.
Also, ese SH fair more from the ground, Rob is large and gets sucked into ur Fairnado pretty easily. Also, I would actually encourage a bit more spin charge against this specific ROB, because he is not gyro happy(did he even use it at all?) The best Rob has against a spin charge is his laser, which you can get past pretty fine. Umm remember you can shield from a foxtrot with SideB cancel. I didn't see you follow up your ASCs with an aerial a few times, so that was some damage opportunities you missed. Be careful with the angle of your ASC, try to make it so that you are entering with a 45 degree angle with respect to ROB, as othrwise you may be grabbed or hit out of it.
Charge fsmash more. You will hit with one fully charged fsmash per match, guaranteed XD. Its the best counter against spot dodgers, and its awesome for opponents who are trying to recoer and then airdodge.
I'm not sure exactly how well dtilt combos work against ROB, but you could have tried some dtilts to utilts.
I saw you use sideb shield cancelling, but you only used it from far away, more to just cancel the SideB rather than for any actual purpose. You should consider using it as a mind game approach, and it powershields alot.
Thats it for now XD.