I just picked up peach this weekend, and I tested it out today on our good friend Sweet T who mains marth. We played a ton of friendlies and in our set of 5, I really studied the matchup, and I actually took him to game five and barely lost.
Psychology/Baiting
Some people (like Sweet T) like to do nothing/wait/make you approach (as you know Lust). Sometimes I see your peach just approach with a Fair or Bair. Which works on occasion but not so much against marth. I would just pull a turnip whenever I got a chance and would punish his reactions to them. Since we are even technically, it's more a psychological battle, and when I hit down smash after down smash he begins to moan. Should I stop down smashing since its a very good move? **** NO! Continue to use it when it's needed, and hell just kill him with it. The more pissed the more likely he will do stupid things(same goes when he is landing tippers, you are always in the game, keep positive no matter what). When his marth would approach I would shield when he was in range for a tipper, and if he came at me in the air I would keep my shield and punish with dsmash or Nair OoS. If he approached me on the ground then i would spot dodge the grab or stupid dash attack that occasionally happens, and then I would down smash after the spot dodge. The main thing I do against Marth with my puff is bait -> punish. So I just tried to do somewhat the same with Peach, and it worked just as well as puff if not better (becuz turnips are da best).
Edge Guarding
since I'm not very good at Peach yet I decided to stay safe with edgeguarding, and I would just hurl a hoard of turnips at marth when he was off the edge, and it sometimes got the kill (landing a stitch off-stage is a KO so good for peachy).
When someone tries to ledge camp, and they aren't perfect at it I could sometimes pull of a dsmash or dash attack to knock them off/gimp them.
And the classic dsmash when he tries to sweet spot the ledge works wonders and peeves your opponent.
Things I notice from your gameplay after playing seriously with peach
My initial thought was why you use up smash a lot. It's a great KO move on the sweet-spot and a good combo starter on the weak hitbox, but I constantly see you or myself get punished for using it, or should I say abusing it. Most players will notice you fishing for it at the end of a stock so just play it safe and don't fish for it to where it gets punished.
MORE TURNIPS. Especially against an opponent like Marth. Something I noticed was at higher percentage my dash attack would send marth higher and when I tried to follow up with a Nair or Up air I would just get sliced in some way by his long sword. So rather than following up dash attack, I found time to pluck a turnip and get under him and throw it straight up or fall back and throw one at a distance to get another opening.
You use Nair more now which is good, you used to rarely do it. JUST KEEP NAIRING. Insta-float Niar-ing works great, and the priority feels great.
Overall, I'm beginning to really like peach quicker than I thought. I may be new to the peach metagame, but I hope my input helped you Lust. And I look forward to learning more things about peachy rom you and on the peach boards
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