gear-sized vs. small opponents. Overkill.
Strongly disagree with giving Deus free AI when this is explicitly the gimmick in-game form, but yeah, I agree that the 20 PCHP damage is pretty badass. That said, for sake of sanity, I'll assume Gear opponent scaling.
Clarissa Arwin and Alexia Lynn Elesius (Wild ARMs XF) vs
Deus (Xenogears) - Alexia deals a bit more than average damage. Unfortuantely for her the way you do a lot of damage fast in XG Gear Combat is to build up to lvl. 3 or whatever with counters, then let Deus beat himself up, then kill him. I'd probably say average damage needs to be a 3-turn average where that big damage doesn't show up, so Deus's HP is pretty awesome, maybe 6 PCHP. Even if Deus derps up and targets Clarissa first with his random attacks, I don't think this works for them, even if Deus uses his gravity move 2/3 of the time.
Stocke and Aht (Radiant Historia) vs Deus (Xenogears) - Healing.
Jowy Atreides and Tengaar (Suikoden II) vs
Deus (Xenogears) - If Deus didn't have a final attack, then Jowy would probably win, but he does. (I *do* assume that if your last Gear dies to this attack, you lose, right?)
Ryudo and Millenia (Grandia II) LOSS vs Deus (Xenogears) - Healing, SBE.
Lyon and Miakis (Suikoden V) LOSS vs Deus (Xenogears) - Healing.
Vanille de Oerba and Claire 'Lightning' Farron (Final Fantasy XIII) LOSS vs Deus (Xenogears) - Healing.
Prove Yourself Division
Uh... Houston, we have a problem. Yu Yevon has 100K HP. FFX has a damage limit of 9999 -> 29997 is the maximum for a single dueler to inflict at once, scaled. (Granted, that is basically average damage at this point in the game.) Ultima apparently unlocks at 66,666 HP. Which means that it's basically impossible to kill him before Ultima without a double. And he's 119% average speed. If you do have one character who can double, everybody on the team better be able to spam average damage, since 30 K damage -> 10K counter-cure -> 30K damage -> 10K counter-cure -> 27K damage is required to actually finish him off. I wouldn't normally enforce such things, but when the entire gimmick of the fight revolves around it, I'm going to enforce that gimmick. (Yu Yevon does a lot worse if you hand out Break Damage Limit to everyone in the DL, since then his bad defenses matter more. As is, they just make it so that characters with slightly below average damage can still do 9999 damage -> 30K scaled damage.)
EDIT: On second thought... Yu Yevon's gravity is way more badass than I thought? In that it does 3/4 HP damage. Knocking Yevon down to 25K life right away, which is pathetic. Okay, never mind, this goes from "everyone loses" to "everyone wins," at least if we force Yevon to use the Gravity move rather than pass, which I would.
SECOND EDIT: See reply to Elf's post.
Thomas and Cecile (Suikoden III) LOSS vs
Yu Yevon (Final Fantasy X) - Thomas is the only one with an argument for a double, and his damage isn't good enough anyway.
Estella and Rody (Suikoden III) LOSS vs
Yu Yevon (Final Fantasy X) - Estella despises the damage cap, it'd be an easy win otherwise. (Get Doublecast like Lulu?)
Saradin and Norn (Ogre Battle: March of the Black Queen) vs
Yu Yevon (Final Fantasy X) - They'd lose anyway, not enough offense to blitz past offense.
Genis Sage and Colette Brunel (Tales of Symphonia) LOSS[/b] vs Yu Yevon (Final Fantasy X) - Yu Yevon's bad defense would seal it normally, but once again, no double + damage cap. EDIT: This may actually require math now that I know Yevon's HP is 60K rather than ~70K.
Noel Chandler and Chisato Madision (Star Ocean: The Second Story) LOSS vs
Yu Yevon (Final Fantasy X) - nope.avi