Yveltal vs. Earthbound Dead (WA4): EBD does about 30% to Yveltal, and is over twice as fast. Roost is obviously out, so how about Oblivion Wing? That heals off one attack, but... no, EBD barely has a 5-2 here, so that's game even if Slow doesn't activate. Yveltal can't OHKO or anything. Although... hmm, there's Disable. Since EBD only has one damaging move, Yveltal could use that and then try to win with a 2HKO before it wears off. But... even then Slow Down kicking in would potentially ruin this strategy, and I'm not sure how I feel about Disable shutting off an "only damaging move" in situations like this. Anyone have any thoughts?
Yveltal vs. Blue Fiend (Lunar 2): If silence works on Yveltal, he's fucked. Otherwise, Blue Fiend still 2HKOs with water nonsense... unless Snarl is used, right, that's neat. So Yveltal opens with that, and from there can heal through anything (physicals do 35%). He has Taunt to spoil the healing, even. I'm not inclined to see silence working here, although it would flip the match if you do.
Yveltal vs. Victoria (BD): Well, Victoria's not winning with damage against dark resistance, so Corpse it is! So Yveltal only gets 4 turns to work with. Can he 4HKO? ... oh fuck no, Victoria resists dark too!
Yveltal vs. Lulu (FFX): Doublecast Death.
Yveltal vs. Citan (XG): Citan is faster with a 2HKO.
Yveltal vs. Latios (Pokemon): Latios is faster, but most of its damage is nulled. It can 4HKO with Dragonbreath. Meanwhile, Latios is weak to dark, so is probably close to being OHKOed. It can't recover from that (literally).
Yveltal vs. Sephiran (FE10): lolol Yveltal against light damage. Doesn't have enough damage anyway.
Yveltal vs. Hrist (VP2): Hrist is slightly weak to dark, which makes this very hard. She can win with a turn 1 basilisk proc, but meh.
Yveltal vs. Deis (BoFs): I vote on BoF1 Deis since she's actually a required PC in the plot of that game, and... is very good anyway. Here, she justs uses Rub, it'll be turn 2 (3 at worst, but probably not, Yveltal MDur is mostly HP), and she isn't being 2HKOed in the meantime. Yveltal could use Disable, but then she blitzes him with damage, he can Snarl and turtle with healing but that just leads to Disable wearing off.
Yveltal vs. Summoner (FF5): Yeah, again, doubt Yveltal lowers the status odds enough here.
Yveltal vs. Justin (G1): Faster, 2HKOs. (Probably.)
Yveltal vs. Martym (TO): Martym's physicals being ice is not what Yveltal needed here, for all that he'd probably lose to the weirdly good Dark Knight subcommander anyway.
Charlotte vs. Earthbound Dead (WA4): 2HKOs, isn't 2HKOed. She doesn't double but it doesn't matter, Charlotte damage is still real good. If I had anywhere near Dhyer level disrespect for EBD's HP this would be a OHKO. EDIT: Wait, forgot Earthbound Dead doubles here. So... yeah, the operative question is 3HKOed, and she is 3HKOed. But... she has 22% evasion, so she should dodge one of those hits.
Charlotte vs. Blue Fiend (Lunar 2): Well Charlotte overpowers the healing pretty easy. Blue Fiend does 2HKO her back with whatever magic combo, though, so she needs to work fast. But... yeah Charlotte does over 140% per attack when she doubles, and she does here. 280% is certainly too much.
Charlotte vs. Victoria (BD): I'm willing to go along with Random's argument here, sure. Charlotte has a 70% chance of getting a critical which will be fatal on her second attack, and can chip with bronze to avoid it turn 1. Accuracy could fuck things up a bit but I'd have to require Charlotte has a >67% chance to win even with accuracy, and that feels a bit too harsh. It helps immensely that Charlotte vs. female crit rates are actually something unique that she does.
Charlotte vs. Lulu (FFX): lolno, Charlotte would need to hit twice through that evade.
Charlotte vs. Citan (XG): Don't see Haste letting Citan double... but there's a chance he's fast enough to double at base? He's also extremely close to a 2HKO to me (no Kokei or Yamikei). If he doubles and 2HKOs he easily wins. If he does neither, he almost surely loses. If it's one or the other and he kills in two, then he needs Charlotte to miss once... which thanks to -10 Hit + whatever WTD penalty I throw at her (a further -7.5 for A rank enemies? I dunno) is certainly possible. On average I think Citan wins, but I could see voting the other way.
Charlotte vs. Latios (Pokemon): Faster, 2HKOs, avoids being doubled.
Charlotte vs. Sephiran (FE10): Charlotte would need an outright OHKO here, and I don't buy that. Now, if she doubled, and she is close to that, she could take this... mm. Actually, no, Charlotte has partial WTD here, and Seph actually has pretty good evade, so I doubt she'd hit twice anyway. (I agree that discounting terrain probably lets her win, too, but eh the terrain is a feature of the fight and it's very hard to avoid (Parity exists, I know), and I see no problem with relatively rewarding the FE bosses who are smart enough to use it since they're usually way better than fools like Nergal who stand stupidly on an empty panel.)
Charlotte vs. Hrist (VP2): Get wrecked.
Charlotte vs. Deis (BoFs): Faster, isn't doubled, uses instant death or just 2HKOs with magic.
Charlotte vs. Summoner (FF5): Ouch.
Charlotte vs. Justin (G1): That ID axe triggers counters so is unacceptable, and otherwise Charlotte is faster with a 2HKO. Don't think WTD is enough to make her miss once, she can use Bronze + Silver if need be.
Charlotte vs. Martym (TO): Charlotte doubles for me, but Martym's still a tough cookie. Still, if she 4HKOs him, she has this... but could only possibly do it with four silver hits, and no way do all four hit with WTD in there. If she fails to kill in two attack strings, Martym attacks twice, which might not 2HKO by itself but will with his counter to her in there. (If she doesn't attack, he just builds MP/TP.)
Charlotte 5-6
Yveltal 4-7