Godlike
Protea (Wizard of Oz: Beyond the Yellow Brick Road) vs Kyogre (Pokémon)
Dark King (Final Fantasy Mystic Quest) vs Hugo Hewitt (Wild ARMs 4) - Sure, I'll buy the damage blitz
Sigurd (Fire Emblem: Geneology of the Holy War) vs Rofel (Final Fantasy Tactics) - I think Sigurd goes first here, which is good because he gets one good shot. Unfortunately Rofel kind of has these things called physical evasion and some semblance of physical durability, so even with the insanity of FE4 holy weapons one-rounding is a bit much to ask for. Not Sigurd's fight.
Reiji Arisu (Super Robot Taisen OG Saga: Endless Frontier) vs Knight (Final Fantasy) - Reiji's a slug first turn, is below average accuracy to begin with, and doesn't have Strike, and his damage is all in something like a bazillion tiny hits. Dude gets spoiled hard here, Knight is too durable to be taken out quickly by someone who is entirely evadeable and barely 2HKOs as is.
Aima (Lufia: The Legend Returns) vs Cloud Strife (Final Fantasy VII) - Okay, FF7 has a paralysis blocker. Fuck I have to think about this now don't I. uh okay
Aima is a bloody freak with 168~% average HP, below average defenses but haha L3 PC defense impact, about -0.25 SD below average speed. Does roughly average damage *at first* assuming you don't allow starting IP, I however do, so yay I get to readjust the damage average to see if Aima gets to do something a bit saner than approximately 1.8x PCHP overkill first turn because holy fuck Scatter Hit why are you 50 IP exactly and why do you do 1800 L3 damage that is insane.
*number crunches a three-turn average based on personal interp of starting IP and what the stat topic actually lists for options*
Welp, that changes much, average goes up from 404 to 431. So 1.668x PCHP overkill. I feel so much better. So yeah, apparently Cloud is dead average on physical durability too, so he needs to dodge at least three of those hits to live, and I have noooo idea how evasive he is or can be tweaked to be, so yeah, voting this way unless somebody tells me he can totally tweak to survive and get a level 3 limit (which I am fairly certain he may well be able to if he lives, I allow half-filled limit bars as well) because he needs it, because holy crap I did not realize that half-filled limit and limit-like bars made Aima this fucking stupid.
Middle
Whimsicott (Pokémon) vs Ivan (Golden Sun) - oh wow no
Dacre (Cthulhu Saves the World) vs Mesarthim (SaGa Frontier) - uh status fight don't care to think about this
Light
Mint Adenade (Tales of Phantasia) vs Mallow (Super Mario RPG: Legend of the Seven Stars) - Mint.
Russel Bergman (Super Robot Taisen Original Generation Series) vs Palmer (Final Fantasy VII) - has healing