Godlike
Orphan (Final Fantasy 13) vs. Ameno-sagiri (Persona 4)
Haken Browning, Kaguya Nanbu, KOS-MOS, Xiaomu (SRWOG:Endless Frontier) vs. Asellus, WhiteRose, Mesarthim, Meilin, Riki (Saga Frontier)
Belial (Wild Arms 4) vs. Chris, Geddoe, Hugo, Sasarai, Luc, Emily (Suikoden 3): Belial can 4-D Pocket away the big damage dealers, but the lack of MT kind of sinks her. If you are generous to WA4 single-hex attacks when targetting more PCs then there are hexes, maybe she can do it.
Jenna Angel (Digital Devil Saga) vs. Razeluxe Meitzen, Etward Dysler, Lilianne Valendorf, Puniyo, Yun (Mana Khemia 2): It is fairly hard to manage her, but Shifting in/out will help a lot. Eventually the super-moves come out to play, that + Glaciation is a mean thing.
Heavy
White Mage, Summoner, Ninja, Samurai (Final Fantasy 5) vs. Yuri, Kurando, Joachim, and Anastasia (Shadow Hearts 2): Wasn't SH2 revival of the badass "You keep your CT" variety, so that Kurando can revive Yuri who instantly gets a turn? Doesn't that kind of screw with team FF5?
Ghaleon (Lunar:SSSC) vs. Myria (Breath of Fire 3): Ghaleon's doubled physical does more damage than Myria, negating her speed advantage with his double-acting.
The Dark One (Arc the Lad 2) vs. Kornell 3 + Violetta 1 (Grandia 3): Oh god.
Yuri, Karol, Rita, Estelle (Tales of Vesperia) vs. Ramza, Agrias, Mustadio, Orlandu, Meliadoul (Final Fantasy Tactics): Ramza and Orlandu and Mustadio team up to kill Yuri before he acts, say. Then... Estelle buffs Rita who brings down the Meteorz. Aegis Shield hype will work I guess. ToV can change equips at any time, though. For all that most folks only let the FEers do that.
Middle
Ness, Paula, Jeff, Poo (Earthbound) vs. Loki (Valkyrie Profile): Do they have the PP for this? Bottle Rockets were ITD, but checked Speed instead of defense, right? Vote change required otherwise.
Apocryapha (Radiant Historia) vs. Dorothy, Strawman, Lion and Tin Man (Wizard of Oz)
Cthulhu, Umi, Dacre, October (Cthulhu Saves The World) vs. Exor (Super Mario RPG): MT matchwinning Sleep? Guess that seals it, albeit it's kinda cheap. there ain't nothing the CSTW folks can do about it unless Dacre's Regen also removed status which I don't think it did.
Melfice (Grandia 2) vs. Stocke, Aht, Eruca (Radiant Historia): With revival, damage magic, and switching I think they can pull it off. And they can force him into Traps too, if they have a combo chain opening with magic!
Light
Zed, Jane, Emma (WA:ACF) vs. Edna (Shadow Hearts 3)
Luca Blight (Suikoden 2) vs. Zalera (Final Fantasy Tactics): Boss vs. SRPG boss. The durability difference, it burns.
Serge, Glenn, Irenes (Chrono Cross) vs. Marcello (Dragon Quest 8): Not really sure but don't the CC folks not truly combine their turns? i.e. they aren't 3x as effective when working together? That's fatal when facing an MT boss.
Pikachu, Blastoise, Charizard, Venusaur, Snorlax, Lapras (Pokemon) vs. Peppita, Albel, Adray (Star Ocean 3): 3 on 1 is nasty business, even when you have to do it 6 times in a row.