I just got in on this thread, on this forum, actually, so my X-23 opinions are coming in a bit late. I missed the middle of this massive thread, but I’m surprised that people have not commented on the extremely fun Nemesis/X-23 synergy. In a combo, once they’ve been knocked down, her ankle slice lifts them into nemesis’s wall bounce hit, and then they get hit by the rocket (that’s is in the corner only, if you do this otg midscreen, they’re just gonna wall bounce, and the rocket will whiff, so just dash up and launch, wave dash if necessary). By that point you can heavy and then relaunch for some nice damage. It’s like chun’s legs but scales a ton less, and I can get consistent 700+k combos when the two of them are together. And if you have meter to troll with, you can cancel her otg to dirt nap while nemesis is wall bouncing them, and that usually manages to finish off most characters. Nemesis assist also allows some easy combos off any air throw and dirt nap on incoming/resets, no difference at all from normal combos. Her ankle slice assist is great support for him too. She can help nemesis get some easy relaunches earlier in a combo, and if you’ve used up your wall bounce in really large combos, she can otg into nemesis’s heavy launcher slam for a hard knockdown and some extra damage right before the hyper. Also, I’ve found people who keep too defensive get really frustrated with the low ankle slice and nemesis’s jumping heavy coming in simultaneously.
I also love the Hawkeye triple arrow assist for her. I’ve never used them for relaunching, so I honestly don’t know if they come out too fast or not, but they’re just good locking them down for mirage cross-ups, and just keeping them from punishing X-23’s charging ground QCF moves. Hawkeye’s assist acts a lot like a beam, so pretty much everyone has already said how that works. Maggy, Doom, hell, maybe even Thor, would be fine as well, but I only talk about what I’ve tried, and I don’t use those other characters much.
As fot the earlier topic of whether X-23 can be used as an effective anchor, I don’t see why not. By that point, you probably have more meter, and you have better chances to abuse dirt nap on incoming. The damage boost from X-factor makes even her simplest combos crazy damaging, and the fact that she can relaunch with just charged ankle slice, no assist, is amazing. And if you have the right combos with characters one and two, she can be a fine otg for a lot of combos. And her XF3 damage on her invincible supers finally becomes threatening enough that she can throw them out all the time (my favorite is to bait Akuma’s hyper beam 
). I used to run X-23 as anchor, but prefer her on second, because of how much I like the Hawkeye assist. She can still pop Level 2 X-factor to turn a combo into a dead character, and she gets more chances to use dirt nap than she would on lead. She still gets most of her X-factor exclusive stuff in level 2, like her solo relaunches and her infinites.
Other assists that I know to be fun are Skrull’s Tenderizer (relaunches, I think, but it’s real use is in having some air coverage and giving you a wonderful dirt nap setup on incoming), Trish’s low voltage has been talked about a lot, so yeah, what they said, it’s good. Dormy’s Dark Hole I found to be awesome for locking them down, allowing mix-ups, cross-ups, whatever. And Wesker’s gun works with everything, in particular it lets X-23 charge up a neck slice before relaunching and adds a ton of damage. I can’t stand Wesker, though, so I don’t know too much about what combos you can do with X-23 and Wesker’s other assists.
Anyway, I’ve been looking through here, and I’m glad there’s so many interesting teams with X-23. She’s so damn good on point, middle, or anchor. I’ve been using her since I first picked up vanilla, and she’s amazing. She was always overlooked for Wolvy in Vanilla, but I always thought she had more tools, and made for more interesting teams than a bunch of Zeros and Weskers running around. Her assists are great, her mobility is as well, her damage is fine with a bit of labwork on combos, and it warms my heart to see so many X-23 players in one spot.
Sorry I’m long-winded, I had some catching up to do, and take everything I say with a grain of salt. I still suck at this game and have a lot to learn.
). I used to run X-23 as anchor, but prefer her on second, because of how much I like the Hawkeye assist. She can still pop Level 2 X-factor to turn a combo into a dead character, and she gets more chances to use dirt nap than she would on lead. She still gets most of her X-factor exclusive stuff in level 2, like her solo relaunches and her infinites.