Godlike
Alyssa L'Salle (Cosmic Star Heroine) vs Satanail (Star Ocean: The Last Hope): Man if Heroine Aura lasted just one more turn Alyssa could do something evil with a loop of that, healing, defend, and damage. As is if she drops Heroine Aura late in the fight she gets dunked on. She may just get statused out early too... and Void is actually a nasty status for her too.
Heavy
Asellus (SaGa Frontier) vs Fauxnel (Valkyrie Profile: Covenant of the Plume): Suspend Motion strikes again. Asellus gets one turn first but I don't think it's enough; MysticChange shouldn't stop Suspend Motion from being turn 1, GlassShield gets responded to with a non-melee free spell attack, and she can't OHKO.
Trainer P (Final Fantasy X-2) vs Corrin (Fire Emblem: Fates): Petrify Flurry gonna make all of Fates royals pretty unhappy.
Camilla (Fire Emblem: Fates) vs Ryoma (Fire Emblem: Fates): Y'know all the times I've played Conquest Chapter 12 I don't think I've fought Ryoma with anyone else. (No Dual Club, but Swordbreaker has the same effect.)
Middle
Leonara (Final Fantasy IV: The After Years) vs Saber (Fire Emblem Echoes: Shadows of Valentia): Saber 2RKOs her and is faster, so Leonora needs to do something decisive before then... I imagine Hold works?
Natalia Luzu Kimlasca-Lanvaldear (Tales of the Abyss) vs Lyon (Fire Emblem: Sacred Stones): I feel like this was a DL match at some point.
Cathari (Suikoden V) vs Cecil Harvey (Final Fantasy IV): Has a 4-3, 4HKOs and isn't 2HKOed since Cecil doesn't 2HKO anyone ever.
Light
Virginia Maxwell (Wild ARMs 3) vs Bard (Final Fantasy V): Status hell is probably too much for Virginia, though Condition Green's an interesting ripple... in that if Virginia reaches 100 FP she immediately breaks out of status and uses Gatling for ~87 PCHP, killing Bard. On the other hand, FP gained from damage in WA3 is minimal (should be 1 FP from Bard's puny damage), so as long a Bard can maintain a Stop lockdown, she's fine. Just needs to make sure Ginny never gets off more than like 4 of her own attacks. I... think Bard can manage that. Stop's really good. Also, if Confused Virginia doesn't gain FP from attacking herself, then this gets easier.
Raja (Phantasy Star IV: End of the Millenium) vs Bowser (Super Mario RPG): Legend of the Seven Stars): Usual Raja problems; Bowser doesn't quite OHKO but he's faster and heal-locks.
Corselia (Suikoden Tactics) vs Soleil (Fire Emblem: Fates): Hmm, Corselia can 3HKO if she's on a water panel using Breath of Ice, and is only 3HKOed back. So... open with Kindness Drops and just outslug? Now that I look closely Corselia seems a bit better than I'd been led to expect.
Lilianne Valendorf (Mana Khemia 2: Fall of Alchemy) vs Lucius (Fire Emblem: Blazing Sword): Magic damage vs Lucius is not the way to go. At a glance, stat topic suggests Lily needs about 5.9 turns to kill, and I don't see any holy resistance for her. (if anything holy should strike a weakness on Lily)