Gong (SF1) vs
Kain (FF4): Blood Spear is pretty horrible... but yeah probably handles Gong.
Gong vs
Doll (Saga): Charm is a problem Gong can't really afford, since it drains all his MP really quickly. Draining takes care of the rest.
Gong vs Dean (WA5): I think he can handle this. If I'm underrating Dean's crit rate, though, the latter might take it, since those criticals do hurt.
Gong vs
Onix (PKMN): Onix has all the time he needs to minimise Gong's defence then start 2HKOing.
Gong vs Palmer (FF7): Finite Palmer MP.
Gong vs
Ward (FF8): Oh dear, that would be a limit.
Gong vs Guido (G1): Guido only 4HKOs Gong, so isn't much of a threat.
Gong vs
Swordmaster (BD): I think? Know Thine Enemy + The Worm Turns is too many nasty counters for Gong to trigger, and Swordmaster's extra durability helps a lot.
Gong vs
Relm (FF6): Relm turtle strats are superior.
Maribelle (FE13) vs
Kain (FF4): Outslugs unless Kain both fails to double and doesn't trigger counters. Which is possible of course, but I'm inclined to see Jump ignoring FE mechanics entirely just because the idea of Jump doubling is kinda nonsensical... which in turn means no counters are triggered. Kain 3HKOs and is faster.
Maribelle vs Doll (Saga): I think so. Any missed Power Grab is disastrous. Maribelle 3HKOs and counters and may even double, so yeah, ugly.
Maribelle vs
Dean (WA5): Outslugs by 2HKOing and not being 3HKOed. It's kind of depressing how below average speed/damage fighters can still beat Maribelle.
Maribelle vs Onix (PKMN): Onix resists all the FE elements, so hey Maribelle only... uh, 3HKOs, good job Onix MDef. Onix gets one attacking turn, great.
Maribelle vs Palmer (FF7): Oh no, ST magic damage against Maribelle. I think Palmer may lose this even if he doubles, and I'm not at all sure he does.
Maribelle vs
Ward (FF8): Maribelle has the damage control to dodge a limit, but Ward... does like 30% to average with his normals, so wins the same way Dean does.
Maribelle vs Guido (G1): Finally Maribelle faces a fighter who can't 2HKO her. lol Guido.
Maribelle vs
Swordmaster (BD): Before Swine 3HKOs and the magic halving means he has all the time he needs.
Maribelle vs
Relm (FF6): Faster and halves elements so isn't 4HKOed, and 3HKOs at worst.
Frederick (FE13) vs
Kain (FF4): Kain is faster and 4HKOs with Jump, while Frederick should miss the 3HKO the other way. Close though!
Frederick vs
Doll (Saga): PowerGrab is boosted considerably here, so I think Fred is screwed.
Frederick vs
Dean (WA5): Doubles and counters offset. Fred goes first, but... I think Dean needs one less hit to kill (definitely needs 3... think Fred needs 4)
Frederick vs
Onix (PKMN): Doubled Slam is a 4HKO... of course that triggers counters so may not be wise, although Onix may survive eight Fred attacks anyway? Yikes. Regardless he opts for another strategy, Screech first then trigger fewer counters that way.
Frederick vs
Palmer (FF7): Oh no, magic damage!
Frederick vs
Ward (FF8): Not sure Fred has the needed damage control to avoid a limit... or that he'd win anyway, Ward doubles with normal attacks and may just outslug.
Frederick vs Guido (G1): If Guido can double with a ranged weapon he might take this, but the stat topic doesn't say how good bows are at the time and like hell I'm tiebraking an unknown for GUIDO.
Frederick vs
Swordmaster (BD)Frederick vs
Relm (FF6): Counters and doubles offset, both 4HKO, Relm is faster.
Maribelle 4-5
Gong 3-6
Frederick 1-8
Bunch of winners here.