Zeromus (Final Fantasy IV) vs Nailah (Fire Emblem: Radiant Dawn)
uhhh. Zeromus probably kills in, like, 3 Viruses + 2 Flares? Can Nailah 3HKO? Zeromus is roughly ~2 PCHP… but 3x Nailah hits are ~1.65 PCHP. BUT Nailah has evasion, so on second thought, maybe a 4HKO from Nailah is fine, since she can not only gamble on good evasion luck but also on Savage.
Tibarn (Fire Emblem Series) vs Violetta (Grandia III)
While I dunno entirely about Blaze Wall hype since it’s circumvented pretty easily in-game, Chant of Despair or status probably do the job anyway.
Rupert Dandridge (Wild ARMs XF) vs Cidolfas Orlandu (Final Fantasy Tactics)
2HKO that MP at worst, sure.
Royce (Lunar: The Silver Star) vs Ashera (Fire Emblem: Radiant Dawn)
Royce does have MT so this isn't entirely open & shut, but sure. Being slow does not help here.
Heavy
Nina (Breath of Fire IV) vs Percival Fraulein (Suikoden III)
Middle
Seifer Almasy (Final Fantasy VIII) vs Kyle (Suikoden V)
Well, boss Seifer is a Light and loses to everything, so PC it is. PC Seifer, if allowed at all... about the harshest scaling I’d grant would be to stick No Mercy in Seifer’s average damage since it’s so easily accessible, but that STILL is gonna tip it for Seifer here. He might even win if you scale him against everyone with limits active, because Quistis & Selphie's limits are gonna suuuuck comparatively during the (short, irrelevant) time when Seifer is around.
Karin Koenig (Shadow Hearts: Covenant) vs Sgt. Joe (Suikoden III)
Healing.
Lexis Shaia (Lufia II: Rise of the Sinistrals) vs Clarine (Fire Emblem: The Sealed Sword)
Clarine has really good evasion, so going aggro is the wrong kind of YOLO. THat said, the spam healing a lot strategy... Lexis has 21 shots of Stronger, but that may be overkill when Clarine didn’t score a crit. How good was vanilla Strong healing?! He'd have 56 shots of that. Clarine has 125 shots of Thunder and either a 6 or 7% critical rate (L15 vs. L20). But, ignoring critical rate, if Clarine can 2HKO, Lexis will never have time to use MP-restoration, barring extremely rare doubles from Lexis's barely-above-average speed. 1/4 MP would be either 5 shots of healing or 14 shots.. I’m not sure if Lexis’s tiny advantage even merits a 15:14 here, his 103% speed means that it’s more like a 34:33 or something.
The next question is if Clarine even 2HKOs (well, 4HKOs + doubles) or not. She definitely doesn’t at L15, but if Lexis goes for the stall strat, she’ll hit L20 anyway, and at L20 she… BARELY, barely 2HKOs? Like. Could see it as a survival check, she’ll deal .88 PCHP damage resisted down to .85 PCHP by the magic resist, which is apparently exactly Lexis’s HP, so any slight adjustment in respect one way or the other can tip this.
Anyway, this means that Lexis gets 56 + 14 + 14 heals off = 84 heals and 2 doubles where he restores his MP. Then he runs out of juice and has to YOLO attack anyway. If she had to level up, maybe make that 84+14+14 = 112 shots of healing, but probably a little less in practice from using Stronger on turns Clarine got a crit. I guess I can maybe see not letting Clarine walk in with 5 Thunder tomes worth of ammo, but it looks like she narrowly outpressures the healing strat.
Light
Leonardo (Fire Emblem: Radiant Dawn) vs Labyrinthia Wordsworth (Wild ARMs XF)
That’s gotta hurt.