I love how some of you guys are scared of this MU, when some DDD's on the DDD boards are afraid of this MU the other way around.
I've found that this MU is heavily stage dependant, so if ROB wins round 1, it's usually not hopeless to win the set. DDD counterpicks you round 2, you probably lose, but you get the stage advantage round 3. However, if DDD wins round one, your best interest is to switch characters, even if you win round 2 and take him back to a neutral and you win, he still gets a CP on you, which will most likely be Delfino, Castle Siege, Halberd, any of those really, and unless by some crazy miracle, you'd probably lose. It's a sad fact that ROB's must face.
I know this isn't that much info, but I guess it can help? I hate to say it, but I know this MU a lot better from a DDD's perspective at this point.
It's definitely 65:35 DDD's advantage.
Good ROB stages: Smashville, Lylat, possibly Yoshi's?
Good DDD stages: pretty much anywhere else, the best being FD, Delfino, Castle Siege, Halberd, and RC