Godlike
Melfice (G2) vs Songi (LoL): I remember Chaos Flare doing 900~ damage, which doesn't account for Spirit kicking in, and I'm sticking by that.
Choko (AtLC) vs Xorn (G3): Ahahahah no.
Nate Nanjo (Pers) vs Sierra Mikain (S2): Nate is weak to darkness. Fuck the P2 form since its Split Path only, and worse than his P1 form in like every other scenario, and I don't buy him being necessarily faster.
Cyril (SO2) vs Jade (BoF1): Cyril resists Lightning right? Oh look Jade's godlike durability and half decent physical considering the durability prove that he DOESN'T JUST NEED BOLTX.
Heavy
Arngrim (VPs) vs Cliff Fittir (SO3): Cliff has an easy 3HKO here...but Arngrim kills on turn 2 anyway, so doesn't really matter.
Ayla (CT) vs Kika (S4): Goes first and 2HKOs.
Garnet til Alexandros (FF9) vs Knight (FF1): Yeah, Garnet's just well suited for Knight. She's faster, for starters (Disrespect FF9 speed if you will, it doesn't change the fact that she's above average speed against an average by default PC, so wins tiebreaks.) With that, she either gets the 2HKO in first, OR she casts Protect, turns the responding 2HKO into a 3HKO, thus can play defensively with healing+Damage or status.
Bruiser Khang (ToD) vs Ike (FE9): Whoever goes first wins...and both have arguments for going first. So...lets look at the fight in this way!
If Ike goes first, he wins; he gets his second turn first, thus wins the 2HKO war. That much is obvious!
Now, if Bruiser goes first?
First off, if you see Ballistic as being countered, Ike wins. Ike's getting 4 attacks to Bruiser's 1, and 4x Ike's damage *BEFORE* Aether is going to kill Bruiser. Not sure how reasonable it is to allow Ballistic to ignore counters, would need to see the move. After all, if its a simple case like "Move can hit things in its line of fire despite an obvious bias on target", then its...no different than any other ARPG attack, where all moves have some AoE aspect, and I'm not buying All ARPG attacks > FE Counters! If the move is one of those "hits everything on screen!" attack meanwhile, then yeah fair game.
ASSUMING IT DOES IGNORE COUNTERS...
Ike has about a 24% chance to win still. If Aether goes off, Bruiser...might very well be screwed, let alone if it goes off twice. Chances are, it won't in one Ike attack, but it still might.
That's not factoring in Criticals either, though, unsure if Ike actually has a Crit rate endgame or not. Thinking he does, and while its small, its still a chance to kick in. As a reminder, if Ballistic can Crit? Ragnell gives Ike immunity to Critical Hits anyway, so non factor.
What's this mean?
If Ike goes first, he wins, plain and simple.
If Bruiser goes first, he USUALLY wins, but Ike can pull an upset through Aether or possibly a crit, which means he doesn't always win.
Given all this, I think the odds are in Ike's favor. If you take one call against Bruiser (Ike going first or Bruiser's Ballistic gets countered), he loses. If you're on the fence about it, Ike still has the average of wins.
Middle
Bartholomew Fatima (XG) vs Dekar (L2): Wild Smile does bad things to Dekar, I wanna say.
Mog (FF6) vs Jean (BoF2): Death again!
Jade Curtiss (TotA) vs Shoon (S5): Kneejerk.
Lufia (Lufia) vs Haschel (LoD): Haschel puts enough pressure on Lufia, and IIRC, his damage gets pretty sick if he gets low on HP. Oh, he ALSO immunes her best damage, go figure.
Light
Ace (S3) vs Red Wizard (FF1): Healing should give him a win.
Ernest Raviede (SO2) vs Jun (VP1): This fight fails too much for me to think about, so I'll just say VP Fighter> Ernest for now?
Gengen (S2) vs Nina (BoF3): This fight really really fails!
Relm Arrowny (FF6) vs Taloon (DQ4): Sword Edge Armor hype gets countered by Gravity Rod 25% chance of Quartr hype, especially since Relm can use said Gravity Rod to heal from Taloon's damage. Yes, his damage is that bad that Relm's healing strategy would actually work.