Work around the lame game. do some fake aerial approaches to try and bait out his lame stuff. jump, as you approach the ground jump again trying to bait a move. if he doesn't, try down B afterwords. baiting out rob's lazor and spin top is essential and since his air projectile game isn't the strongest, using the air to get around it is opitmal.
never however try and come from above directly at him unless punishing, like most characters Zero suit is better suited (lol) to a more grounded approach style, so if you can bait out both his zoning tools, approaching him becomes much easier. if the ROB is entirely focused on lame game, once those two are down, chances are a roll is comming once you approach. read it and punish with a grab or side B/Smash. etc