Godlike:
Dorothy (Wizard of Oz) vs. Mewtwo (Pkmn) - FRLG version probably loses? The lower magic durability means that Dorothy can just Sleep->Melt Down->MeltDown->Healing Hand loop him to death before he can buff himself into amazing. If he tries Safeguard, then she Heal-locks him with 3xMelt Down->Healing Hand until she outpaces his healing. RBY version has a better chance, despite still being Sleep-bait. Mostly because He'll open with Amnesia and turn Dorothy's MD damage to laughable levels. If she goes the physical route, she's dealing with his other buff and lower damage total per round, but more sustainable. She's probably not heal-locking him though and she'll have to run him out of 20 charges of Recover before he runs her out of ~30 shots Healing/Mirror Skin (depending on whether he opted for Psychic or Swift). Probably Dorothy.
Rorolina Frixell (Atelier Rorona: The Alchemist of Arland) v Yuna (Final Fantasy X) - Exciting-looking match. Rorona can actually take down the Unlimited Aeon Works if she gets a turn! I think she one-shots everyone but Ifrit and Yuna (they love that Fire Absorption deal here). As fun as it was to learn that, it all comes down to who goes first, which in this case, is Yuna.
Bishop Ladja (DQ5) vs. Loki (VP1) - Just going by the stat topic, I'd peg average damage/turn against Loki as ~123000. He's got 400000 HP. Ladja is looking at 480 damage/turn with his 3800 HP. Thinking Ladja wins the durability war here? And after Bounce, Loki and Ladja are both dishing out 2HKO damage per turn.
Heavy:
Roy (FE6) vs. Bubba (LoL2) - Hmm... looks like Roy gets two solid hits in. If either criticals, he wins. Bubba spends his first turn buffing instead of giving Roy a counter then... Bubba just OHKOs too solidly, even with Roy's evasion, I'm thinking. It's close though.
Klein Kiesling (Atelier Iris: Eternal Mana) v Wren (Phantasy Star IV) - Wren opens with Positron Bolt and OHKOs Klein? Well, maybe not, Klein has some decent Lightning res, and I think Positron Bolt was electric-typed? If Klein survives, he full-heals, and eventually piles on the defensive alchemy before hitting Wren with some relatively average, but (presumably?) ITD damage from Dirk. Of course, Wren has a lot of HP to slog through, and tons of healing. I think Klein runs out of resources first. Wren also resists fire, so even if you allow Klein the rare/crazy-powered Dragon Gem, he's not OHKOing Wren. Pretty sure that tilts things in Wren's favor.
Marta (ToS2) vs. Billy Lee Black (XG) - Heh, this is really Marta's kind of fight. At best, Billy has a high 3HKO, so Marta just takes her time healing until a Mystic Arte to bust past Billy's own nigh-infinite healing. Marta plays Billy's game, just better. Except the whole Haste thing~
Levail (FE10) vs. Queen Zeal (CT) - Levail gives people free double-hits until he's in Resolve range. Zeal probably uses the doubled Dark Gear to chip him to just over 50% health. MT, so Levail doesn't get to counter. Hexagon Mist also prevents the counter, but won't get doubled since she'll knock him into Resolve range with that. He gets a solid double in with good crit rates, but I think it's a bit shy of finishing Zeal off (Impale shouldn't be an issue since he can't move and it requires him to be in melee range, and Zeal's just pelting him with magic). One more Hexagon Mist seals the deal.
Middle:
Lita Blanchimont (Atelier Iris: Eternal Mana) v Tifa Lockhart (Final Fantasy VII) - Lita goes first and might manage to double-attack Tifa and super-dodge her regular attacks, but with 50% starting Limit meter, Tifa only needs to take like 20% mHP damage to get a L1 Limit and Lita just can't handle that. Lita has that 30% chance to dodge anything passive skill, which would ruin Tifa's day, though. Still, Lita's damage sucks and she'll have to knock Tifa into Limit range and dodge it -again- to get a win here. Even if Lita lucked out and her double-turning skill activated when Tifa was in range of being KO'd... it would just knock Tifa into limit range and she'd get her insta-Limit-turn. Just not Lita's fight.
Snow Villiers(Final Fantasy XIII) vs. Rudy Roughnight (Wild Arms) - I think I'm leaning towards a 0 TP average here with Paradigm-shifting as a free action, so Snow is doing basically average physical damage to Rudy, who will in turn tank his shots and probably 2HKO him back? So Snow is probably going for a defensive strategy with Sentinel? Rudy's not exactly the most accurate to begin with, and Sentinel puts Snow's evade in the stupidly good range. So Rudy can try to build up FP for a Lock-On. Rudy's speed is so slow though, that I'm thinking that Snow gets enough doubles in to switch to Commando and whittle Rudy down before Rudy can pull out 4 Locked-On attacks (Sentinel cuts all damage by half innately, it seems).
Viola (Eternal Sonata) v Lyon (Fire Emblem: The Sacred Stones) - Normal DL Interp: Viola 2HKOs first. Djinn interp: Headshots from afar and immobile FE boss weeps at being unable to deal damage. If I allow him to move, it still doesn't matter as she's insta-doubling him and that 2HKO still holds true. Fun!
Light:
Fee (Atelier Iris 2: The Azoth of Destiny) v Meru (Legend of Dragoon) - Meru is 1.27x average speed while Fee is 1.24x. Close! Meru gets starting SP to me, so she can 2HKO through any of Fee's Ice Res with BSD. Fee might be able to get a weapon with Fire alignment through crafting, but even hitting Meru's weakness, she has to deal with a Dragoon's innate defenses, so she's dishing out average damage at best. Meru's no tank, but Fee's not OHKOing in time, nor can she stall until Meru's SP/MP runs out. If Fee lasted to turn 3, she'd take it. Against Meru, she could probably even physical->Ein Zechsclaw for a 2HKO, but Meru has the speed advantage. Without starting SP, Meru probably still 2HKOs with her human addition -> transform BSD with better speed, but Fee might have an argument for OHKOing with Ein Zechsclaw and a Fire-aligned weapon. Also, AI2 PCs can always opt for GUTS HYPE! 60% is first turn! And Fee only needs one more turn to take it! (Leaning no, but felt it was worth mentioning.)
Nakil (Suikoden Tierkreis) v Blastoise (Pokémon) - RBY form is 2HKO'd first thanks to that pesky Electric weakness and Nakil's best damage being Lightning. FRLG form is knocked into Torrent range after the first shot from Nakil, allowing Blastoise to OHKO Nakil. However, Nakil's best damage also has ~90% Paralysis attached, so Blastoise never gets to use that OHKO. EDIT: STk Paralysis doesn't take effect on the turn it lands, so FRLG Blastoise -would- OHKO Nakil if Nakil opens with Binding Bolt. But, I guess Nakil would opt for chip->BB in that case, to get around Torrent.
Filo (Final Fantasy XII: Revenant Wings) v Viktor (Suikoden Series) - Filo is not a damage master, but with the type advantage and the debuffs, she can hold off the slow Viktor just fine.
White Mage (Final Fantasy Tactics A2) v Guard Scorpion (Final Fantasy VII) - CK couldn't resist trolling.
All of these matches look interesting, so need more research time~
Those were fun matches. Looking forward to the next set!