Frisk from Undertale: The kid is basically untouchable, being able to do a no-hit run whenever he wants, so the broken gets even more broken, Sans won't dodge any attack, bro
Lord Boros from One-Punch Man: Hmmm, not much changes in his battle against Saitama, since this is his only current fight and his opponent is a 4-A, although to be fair due to Saitama's exponential growth, he would be a High 6-A
Godzilla from Godzilla: Dude, a giant radioactive lizard that has high-level martial arts and analytical foresight... My goat will give no-low diff to all opponents
Weiss Schnee from RWBY: She won't be cooked anymore and lose every solo battle she has, maybe this time she can become the leader of Team RWBY, oh wait, the one who chooses is Ozpin, she will continue to be just Ruby's partner... She defeats the fodder Boarbatusk without difficulty, the White Fang lieutenant is stomped, she doesn't need a tactical loss in the battle against Flynn and Neon, she would probably be the one who would go to the next level of the tournament in Yang's place.
In this case she would fight Mercury instead of Yang, as she is skilled as a Garou, she would realize that Mercury has metal legs and would see through Emerald + Mercury's tricks and would not fall into the trap set by the duo to screw up her image, unless they use another approach to screw up the situation, but if it is the same tactic, it would not work.
In this case, the plan for Beacon's fall would have a high chance of going off the rails depending on how Weiss acts with the realization of the cheating done, but assuming Beacon still falls, another possibility is that due to the prominence she will receive for her overwhelming skill advantage when compared to the others in her turn, she becomes a candidate for Maiden in Pyrrha's place, which could greatly screw up Cinder's plan to steal Maiden's power and potentially result in her fighting Cinder, perhaps with the help of Ozpin, which could seriously screw up any success Cinder had in this department. So it's likely that between volumes 1-3, the Salem faction will be heavily damaged and Beacon won't fall like in the original. In fact, much of the villains' plan would be screwed up by Team RWBY's interference, so it's possible they'll try a totally different approach.
Shit I spent too much time on the last one
Anyway, is it just Garou's martial art or will there be any other Haxs imported from him for the character himself?