Ok
LordFreezyPops42
, when I first started fighting Saj he consistently 2 stocked me and I won 0% percent of our friendlies. I then started using a run, camp, and bike toss approach which works very well, but I told Saj about it, and now it's a mix-up over whether or not he n-airs on time to break the bike. Bike to Waft is one of the only true ways you're going to get a waft on Peach, D-air to waft might be possible, but I promise you it's not worth going for because Peach's U-smash does insane amounts of KB and has killed me multiple times for trying to be greedy and punish her. There have been multiple times where she's hit me, I've jumped and tried to land with d-air only to get u-smashed. After fighting Saj, I literally never fast fall d-air against any character unless they're in the air. You can't punish Peach because of her absurd frame data and falling speed which is why I think It's Wario's 2nd or 3rd or 4th worst MU in the game along with Mario and some others. It was a bad MU in brawl and Peach has received significant buffs including a larger F-air hitbox, longer floating time, a lagless Side-b on shield, and I believe the increased shieldstun made her insanely safe on shield. I've probably labbed peach, Ike, Mario, and Little Mac the most in this game, so I'm not kidding you when I say she is safe. If she d-airs your shield, You better roll in front of her or sh n-air (and that's being greedy tbh), if you roll behind she can b-air you which is a kill move and is faster than f-air. Wario used to be able to up-b oos but with the shieldstun patch you can't (you can but you only get 1 frame). You cannot f-air her at low percents because she can n-air immediately before you getting any real follow-up for a nasty 7 to 13% trade. Chomp is ok if she's grounded but if you miss you're getting b****slapped in the face, I never go for it. I can only win like 20-25% of our friendlies at best and this was when I camped hard which I don't like to do anymore, probably why I lost to the same olimar twice at STR xD. Sh-bair is really good because of it's speed outclassing Peach's F-air. I do use f-air a lot but I always fade away because of her n-air. I've gotten F-air to waft before on another Peach but i'll never commit too hard to get that on Saj.
So F-air and fade away. B-air if you haven't seen her commit to f-air; sometimes I'll run away, shield and SH-bair. Bike is pretty useful to toss at her (it's so useful for racking damage because Wario's approach game on Peach is trash) but it's not 100% fullproof. Also, if you wheelie the Bike can hit her whilst floating, but I wouldn't just bike at her for no reason. Learn how to use turnips to your advantage, I think when I can play her game I'll start possibly winning 30-40% of our friendlies instead of 15-20% where I feel I'm at right now. DI her D-throw behind her. Bait air-dodges. Dash attack does not work as an edge-guard, her umbrella goes through the stage, d-air can beat her umbrella if timed right, but be ready to tech anyway. I find myself using sweetspot nair a lot in this match-up more so than in others (altogether not that much) because I'm too afraid to commit to a move with slower start-up. Saj has literally told me, "This match-up just f-air (referring to Peach's f-air)," but I think he was sort of kidding. When you're on ledge, don't commit to a ledge option immediately. He specifically, I don't know about other Peach's, likes to d-air people on ledge and that's when I commit. If you ledge jump, roll, regular getup, or get-up attack on impulse you will get f-aired. And if you ever dash attack against Peach, you're digging your own grave. I don't know if you play melee or brawl, but her pressure game is insane. When she lands with an aerial, its stupid how many mix-ups she gets (I don't even think Saj uses her frame 6 grab lol, he mainly just attacks after landing), so I have to sit in shield to let her get everything out of her system. I usually sh nair oos as a punish, because again dash attack is Wario's one of his least safe attacks on shield afaik (d-smash). I always take Peach to Smashville because I can get Bike to waft there. Be careful around platforms tho, all her attacks seemingly cover the whole platform. If she side-b's, just jump towards where she will land, it's what everyone in our community does against it, and it's hard but with time you can be consistent at doing this on reaction.
Other than that, there are only minor things I am forgetting, and you'll have to figure out what's best for you in this match-up. It's unfortunate that Wario has to camp hard in this match-up. I've watched tons of Brawl Wario videos to see what they did in brawl that works and it seems d-air worked, but Peach's new u-air is very good against it and Wario's d-air has obscene amounts of lag. I think this match-up as well as Mario are what keep Wario from being truly solo viable at this point of the meta. Not falcon, sheik, diddy (which I don't even think it's a bad match-up, just hard), or characters who camp harder. Regardless beating Peach with Wario is the most satisfying thing.
I saw at STR your falling u-air game is leagues better than mine, and also saw you like to SH and FH airdodge before a lot of moves which I do too. I haven't tried falling u-air against Peach, mostly because Wario is super unsafe in the air in this MU as a whole, but maybe you could make it work? Don't be surprised though if it doesn't true combo into itself. If you SH and Full hop airdodge a lot, you're going to have a hard time against campy Peach's and it really isn't that stellar against float. Lastly, I'll just say Saj short hop air-dodges into floating d-air a lot at the beginning of matches which true combos into f-air basically across the entire cast.