HIS NAME IS ROBERT!
Sometimes Roberto.
Finally, a match-up I'm knowledgeable with! I'm always facing Bees in tournament and I live down the hall from a former ranked Rob,
and his Rob playing teammate! In my opinion the match-up is even, sliding toward Peach. Between 55-45 and 60-40 is where I'm jumping around, dependent on how much random momentum Bees gains.
The thing with Rob is that he has a bunch of random "holes". What I mean is Rob has exploitable pockets of lag and whatnot littered around his moveset and everything he does. I play this match-up by poking these holes over and over - the kill comes eventually.
The key to all these pokes is turnips. Essentially they are easy, long ranged, and fast pokes. Touching Peach's shield with anything that lags results in a turnip hit - which combos into everything. Rob has lag when he touches your shield, so the goal is to get in with a turnip, shield, OOS turnip, link to stuff, harass him when he is defensive in the air (which he sucks at), and eventually he dies.
Lemme describe the best course of action based on situation below.
Neutral Situation (Neither has the lead, both in the same position)
Basically, at the beginning of the match the absolute goal is to find a turnip safely. This is easiest on stages that begin you on platforms like Battlefield or Pokemon Stadium - simply start off the match by ledge-canceling a turnip into an airdodge. You'll have the turnip while simultaneously avoiding that annoying "starting laser". Otherwise, wait for the spam. Shield the laser and in the lag, bonewalk a turnip forward, same deal if he chooses to charge the gyro.
Powershield and get it in.
He'll commit to whatever trying to keep you out, OOS turnip it. You are now granted access to your preferred orifice. Commence ****.
Shorthop dair anything he wants to do on the ground. This includes his dsmash.
Once he's in the air: uair. Forever. Really, just keep jumping and uairing - his dair is too slow to protect him. He can only choose to juke though you, or move around you.
Once he begins to get away, choose between two options: a) allow him to reset, grab a turnip yourself, and repeat, or b) harass his landing.
I Choose Harassing (Rob is trying to land)
If he's trying to land on platforms, do the usual. Utilt, uair, usmash, SH nair, etc.
Otherwise, get under him and throw turnips up at him. If he chooses to land through you, he's either covering himself with an aerial or an airdodge. If airdodge: float nair or pivot grab. If aerial: ftilt. It'll beat everything out with speed and range.
Good catch-all otherwise: dash attack his landing.
If he chooses to go around you and you're forced to deal with him on an even plane in the air: use bair. Whenever engaging Rob in the air, speed is key. Bair will beat or trade with his fair and beat his nair. Avoid using fair in this match-up, it's simply too slow.
Rob Recovering (Rob is returning to the stage)
Throw turnips. If you want, chase with float. It's very rewarding if you go all the way out and hit, and if you don't you'll just eat a fair or whatever and make it back before he does. Avoid doing this anywhere near the ledge - you'll get stage spiked.
Once at the ledge, if he tries to go around, invinci-nair.
Otherwise, let him have it and find the spacing to skim him with ftilt if he tries to get off. At this spacing, bair anything he tries doing. Don't go for a turnip, simply keep landing and jumping back into bair position. Ftilt works as well, but doesn't keep him in the trap.
If he goes under, bonewalk and forward glidetoss to the other side to get there before he does.
Peach Wants to Camp (Peach has the lead)
She can too. Steal the gyro, shield the laser that
has to recharge, and run around or whatever. An approaching Rob is much easier to handle, basically the same OOS plan, but with a better projectile.
Uhh, what else? This is getting long, so I'll stop here. I'll answer questions if there are any.
Summary
OOS turnip anything he touches your shield with.
SH dair him on the ground.
Uair juggle him in the air.
Beat his air and ledge game with bair.
Oh, and don't ever let him grab a beamsword. omgnooooooooooooooooooooooo