Instead of just throwing out random stage suggestions I suggest that we go one stage at a time and discuss it in detail so that the thinking is more organized. But please do not underestimate the power of trapping, conditioning and reading.
You don't have to listen to what I have to say, but don't waste space with sarcastic remarks.
Although I was unnecessarily sarcastic, I was not suggesting that I wasn't going to listen to what you wanted to say. You already posted ways to fight TL, which is more than I could do in that aspect. I'm more interested in what I could contribute (stage discussion); However, while we all understand that you have to play smart, it is rather difficult to discuss on this forum, "Be focused and play smart" as opposed to "______ helps Zelda with this." Sure, knowing what beats what and range and whatnot is also useful, but how do you pin down "playing smart"?
It was not meant to be an attack against you; however, playing smart, as I cannot stress enough, is the best thing that wins matches but is NOT the easiest thing to discuss.
It's not a good anti-counterpicking mechanic though, since Sheik and Zelda's matchups are both pretty bad. lol
Match-ups that are 45:55 or less for both characters, not counting using the other:
MK: no worse than 35:65 for both, no less than 40:60 for both
Snake: probably best to go with Sheik, who has a 40:60. Snake should not be worse than a 40:60 against most characters though because he's not the most difficult character to read, but I'm willing to 35:65 him for Zelda.
G&W: Use Sheik, 40:60
Marth: Both have a 40:60
Wario: I don't care because it's always under debate.
Lucario: Use Zelda, 40:60
That is a grand total of 6 match-ups, 5 if you ignore Wario because of all the drama they have with Sheik. Naturally, you're going to see these guys the most at tournaments, so they do have a tough time against everyone... alone.
Of these fights, you'll be hurt doing a Sheik to Zelda thing against G&W, and you
may be hurt doing a Zelda to Sheik thing against Lucario. For the rest:
Snake: Sheik can get inside his defenses and has needles to work with. Lacking in KO power. Switching to Zelda is worth the chances of dying at about the same % in exchange for more killing moves that are not stale. She has a harder time getting inside his defenses, but that's not too bad because she should only have to hit him one time and go back to Sheik. Sheik is capable of scoring KOs on Snake, but Zelda, once given the %s, does equally fine or possibly better at killing. Using both will not be a detriment. At worst, it leaves the match-up the same, but it is highly likely that this pushes the fight into, say, a 45:55. Most of Zelda's problem is getting inside Snake, which Sheik basically elimiinates for all but one time during the stock, which is when you kill with any attack that isn't Jab.
MK: Sheik has lots of legit things on him. Zelda kills him earlier than Sheik, barring grab-release -> DACUS. Both of them can zone him decently, Sheik because of her speed and Zelda because of her range and lingering hitboxes. Using both, like Snake, is not a detriment. It's a benefit if you cannot get the grab with Sheik.
Marth: Sheik, in my opinion and in the opinion of a few notable Marth players, should have a 45:55 or 50:50 against Marth. The issue she has is KO power, but really, it is not difficult for Sheik to edgeguard Marth or to land a powerful aerial like nair or bair (choosing the fresher option, of course) once he's given the percentage. She loses tilt-lock advantages on him, but she still can tack on some free damage with follow-ups. Zelda is at a solid 40:60. It's like the MK match-up, but instead Marth doesn't **** her off-stage like MK does, he can be hit by rising lightning kicks, meaning a shielded Fsmash could easily mean an early death for Marth, and Marth is not quite as lagless. He does have the power advantage with his tipper, but really, aside from tipper Fsmash, what's killing Zelda far earlier in this fight than in the MK fight? 45:55, probably even 50:50 with using both of them. Again, Zelda can be brought in solely for the kill, and while Marth has an amazing defensive game, he still does not have many safe KO options against Zelda.
Naw, they don't have pretty bad match-ups. They're good for the most part.
It doesn't effect any matchup significantly.
HAHAHAHAHAHAHAHAHA!!!
Pit: Even against Zelda, even against Sheik, an easy 60:40 when used together.
DK: Even against Zelda, 45:55 against Sheik, an easy 60:40 when used together.
Toon Link: advantaged against Zelda (consensus says 40:60, though I say 45:55, but whatever), even or loses to Sheik, an advantage for both of them because Zelda's problem is having to approach him often; Sheik means she only has to approach one or two times.
Peach: 45:55 or 40:60 for Zelda, 40:60 for Sheik, at least a neutral together, if not beating her.
Mother boys and everyone below: Zelda/Sheik > just one