Don't expect all of this to be right, but these are my thoughts. This also includes some Mirror Shielding ideals.
Mario: Preferred that you chase him due to his Side-B reflector that he uses while recovering. Do watch out for his F-air spike, though.
Luigi: Shoot arrows to stop his Side-B, then usually, Luigi uses Mid-air jump to Down-B to rise up. Try to chase him and knock him back then, and shoot arrows after that to stop his Side-B again.
Peach: Her F-air has too much priority over Pit, so just keep shooting her, including during her float. Watch out for her Side-B which can auto-grab the ledge.
Bowser: Easier to just shoot him due to his limited recovery, and to lessen the risk of getting Bowsercided, as well as getting hit by his F-air. Predict and Mirror Shield his Up-B, or edgehog him if he's low enough.
Donkey Kong: Like Bowser, keep shooting him. Keep an eye out for his F-air spike if you choose to pursue. Predict and Mirror shield his Up-B. Edgehogging him can be slightly harder to do than Bowser due to the duration of the Up-B. You can Mirror Shield Up-B, too.
Diddy Kong: Keep shooting him. You should be able to knock him back while he does his Side-B. On his Up-B, you can either continue to shoot his arrows. or time an edgehog, whichever is more appropriate.
Yoshi: Because of Yoshi's Mid air jump super frames, you pretty much have to wait and predict. Usually a Yoshi may air-dodge after the Midair jump. Space yourself and try to connect a B-air. Against his Up-B, which can only lift him twice consecutively, try shooting arrows, while watching out for the eggs. He is very hard for Pit to gimp, nonetheless.
Wario: Very hard to gimp with his many possibilities. You got better range and should try to pursue him. Don't expect it to be easy though. You can shoot arrows for a bit of damage, but with his ton of options, he can airdodge or F-air non-charged arrows away.
Link: You can actually do both against Link. Shooting arrows to shut down his mid-air jump, or just pursue him with F-air since u r not just too far from being outranged. Mirror Shield his Up-B for fun.
Zelda: Her aerial range isnt that good, and pursuing her can help. If you shoot arrows, you may make her use her reflector, but remember Zelda's recovery is very limited and can be used to our advantage. Use whichever tactic seems appropriate.
Sheik: Shoot arrows and edgehog her recovery if you must. Keep an eye on her tether recovery if you choose to pursue her, or just watch for it in general.
Ganondorf: Shoot arrows. Don't risk yourself getting Ganoncided. You can edgehog too if you want, but just watch the hitbox from Ganon's Up-B after he spins.
TL: Much more annoying than Link. Watch out for projectiles, and if u pursue him, u may get hit by an F-air. Try to keep distance and just shoot arrows. Mirror Shield henever possible, but you may have to edgehog him since he can still make it back, depending on how far he is.
Samus: Keep shooting arrows and hope the for the best. Samus and her Down-B make it hard to hit her.
ZSS: Shoot arrows, and predict when her chance for using her Down-B, and attack. Edgehog Up-B, and her Side-B can be used as a tether recovery.
Pit: You can choose to pursue or shoot him. Your F-air outprioritizes Angel ring, you can shoot arrows above or below the reflectors if he sets them up. Do whatever from B-air to long-range arrows against his Up-B. Just make sure you hit him once.
ICs: Keep an eye out for their ice blocks that block arrows, If you wish to pursue them, take caution. Just try knocking them back. You can Mirror Shield their Side-B if they ever to use it to recover, even though your Infinite jab almost always outprioritizes it. Edgehogging their Up-B may just Nana only.
If Popo is left, just keep shooting him, then do what you need to do to finish him.
ROB: Keep shooting to apply pressure, and hopefully try to weaken ROB's fuel supply on his Up-B. Keep an eye on his projectiles too. Mix up your tactics and try to F-air or B-air ROB whenever he is close (praying he doesn't F-air you). It will take a bit of time to get used to ROB.
Kirby: Keep shooting arrows, regardless of Kirby's size. You should be safer from possible Kirbycide attempts. Some Kirbys like to try to recover from a high elevation. Try to U-air them, but stay away for they may use Down-B. From a low elevation, predict and Mirror Shield their Up-B if they ever use it. Their F-airs and Side-Bs make them hard to approach. Choose accordingly and appropriately to the Kirby's style.
MK: Shoot arrows, and keep shooting. You're outranged and could get knocked back by F-air, Up-B, etc. Predict and Mirror Shield the Tornado, Side-B, and Up-B recoveries (Glide attack too), but MK is not guaranteed to do any of em. MK is broken, anyways.
D3: Shoot arrows since u r outranged. You can switch up to an F-air now and them to keep D3 guessing, but like Kirby, watch out for suicides, and D3's suicides are harder to get out of. If you do manage to get out in time though, u may just footstool him to death.
Olimar: His Down-B has super Armor frames. Keep trying to shoot arrows, nonetheless for damage. You can try to F-air him if you can predict when he's going to airdodge, if he will, that is, and F-air him. Knock him back as far as you can so you can edgehog him.
Fox: His reflecter hovering makes him kinda rough to approach, so keep at him with arrows, for he would get hit eventually. Fox can recover a bit with Mid-air jump + F-air, so be careful if you do approach. I would rather wait patiently, predict the Side-B or Up-B moment, then attack or edgehog.
Falco: Should be easier to knock out because of his bad Up-B, which would mean, you could expect a Side-B to come. Shoot arrows to pressure him, and prepare for the Side-B when ready.
Wolf: Limited on recovery, shoot arrows to mess him up. Edgehog him if needed. You can pursue him, but watch out for the F-air.
CF: His recovery sucks, so just shoot arrows at him. Another reason why you shouldn't approach is because you could get spiked by his Side-B (You can Mirror Shield this), and as we know, Pit's bad at Meteor cancels compared to most characters. Edgehog his Up-B, but make sure to time it or he will grab u with that Up-B.
Pika: Shoot arrows to ruin Pika's Side-B. His Up-B recovery is hard to predict. He will either go for the ledge or just try to get on stage.
PT:
-Squirtle: He's hard to hit, and shoot arrows, if you can. You could try to F-air him. Edgehog him.
-Ivysaur: Simply shoot arrows at him to get him just about far enough, then edgehog him, while watching out for getting stage spiked.
-Charizard: Keep shooting at him, and edgehog if you can. You can wait for him to come to you, then strike when ready. If you choose to pursue, it may be F-air vs F-air
Lucario: Shoot arrows, even though his F-airs could cancel them. Pit's out-ranged, so it will be hard to pursue him anyways.
Jiggs: Shoot arrows to stop Rollout if the Puff uses it. If she does rollout, hope you hit her to damage her. Watch out for F-air and Side-B, and space with F-air if you want to pursue. It won't be that easy since her recovery is good.
Marth: Shoot arrows. Approaching him may just get you F-aired. Keep shooting arrows to knock him back as far as you can. Edgehog when needed.
Ike: Shoot arrows. Hiit him after his midair jump quick enough to limit him a lot. Pursuing him is not as risky as doing this to Marth since Ike is slower. You can Mirror Shield both Side-B and Up-B, and is one of the easier characters to gimp.
Ness: Shoot arrows sparingly to avoid him PSI magnet your arrows, even though you can still pressure him that way. His F-air will outrange ur F-air, so that's not good of an ideal. You can mess up Ness' PKT by shooting him OR the PKT itself with an arrow (that's like instant death), or hit him with an aerial. Mirror Shielding the PKT impact is majorly risky due to its power. You can also Up-B close to him to push and mess him up.
Lucas: He should be harder to get to than Ness since he has more recovery options, from Zap Jump to the Magnet thing. Gimp him in just about the same manner you can do to Ness. Mirror Shielding him is less risky. Shoot arrows while he's doing the PK fire thing. You can pursue him with F-air if you can predict how he is going to recover.
G&W: If his bucket is empty, you could probably use the lag from it to shoot arrows to make him fall low enough that you may be able to kill him 1 stock. If his bucket is full, you can spam your arrows a bit more freely. G&W's F-air range beats Pit easily, If you are to pursue him, hope that you predict that he air dodges so you can strike him.
Snake: Keep shooting arrows for steady damage, or pursue him. Attack him with F-air or B-air while he's in his Up-B. Pursuing with F-air after F-air can be good for building damage, and keep on him.
Sonic: B-air will mess Up Sonic's rolling if he does come. Use a bit of arrows for damage, and time F-airs. N-air and B-air are better due to their Priority and/or lingering hitbox (Multi-hit for N-air).
This is the best I can do and think of.
