Sub review and vetoes time!
As stated in the OP, during the
Veto / Review Phase, we'll give people a chance to fix potentially broken or extremely weak submissions. Any sub that's vetoed and isn't appropriately nerfed/buffed/replaced
will not be eligible for voting. New submissions can be made and all submissions can be edited during the Veto / Review Phase, but note that newly added things can be vetoed without warning if they are too strong or too weak.
Additionally, this is also a sub review, I'll also be giving feedback on all subs, not just vetoed ones. These are just my opinion, so unless it is a veto, it's up to you whether or not you take my advice. You'll know if something would get vetoed if I put the word
Veto in Bold in the review.

Seems solid with its BoltBeam combo and high stats, simple but effective

Similar to the above, also simple and effective and builds on what was Shocks' best set in OU. You could opt for a very slightly stronger ability, since this does have to be a Rocks-weak item-locked pivot

Reminds me a lot of Steadfast Gallade in VaporeMons, who's a menace sometimes, I could see this working. Maybe add some Attack to sweeten the deal further, since it's fairly weak compared to incumbent Grounds like Tusk and Lando

Pivoting Garganacl jumpscare. Honestly a very neat way to retain Garganacl's favorite mechanic while still being interesting, I like it. (and yes i am happy you said the thing)

This thing looks like a demon, not in like a veto-worthy way since it's still very slow and specially frail, but it looks absolutely terrifying to play against. Reminds me of something like Ursaluna, but with better longevity and utility, should be a strong pick

Pretty fun concept, spending your Tera to make hazard removal very easy, but I do recommend removing Rapid Spin. This having Spin feels very redundant when you made a custom ability for it to remove hazards, so it not having Spin would make people interact with the new ability you made for it, meanwhile if you just wanted it for the Speed boosting effect then you already have Trailblaze. I see the reasoning that it was for non-Tera sets, but I think it would be more worth encouraging the use of the TeraForm for its very unique quality of very easy hazard control

Very fat pivot, was initially concerned that this was too fat to have both Regen and pivoting but after thinking about it, it should be fine since it's so passive. Also, while I actually agree with it losing its Ice moves to prevent any way to beating Ground-types with Avalanche or Ice Beam, I do think this can keep Trailblaze, it's so weak that it's not helping against any OU-viable Grounds

This one has revealed two new things that I did not consider were possible, being lowering the HP stat and lowering BST. The former is of particular interest, though, since I'm not sure if there are any game-breaking consequences when an in-battle form change lowers something's HP. I haven't gotten a chance to test this interaction out, so I'm not vetoing it for that since I'm not sure, but I would probably recommend keeping its HP at 80 to play it safe (and boosting Def and SpD to 80 to keep the symmetry that you appear to be going for). As for the mon itself, it seems pretty mid but that's for the best probably

Neat take on Noivern, gives it new coverage it's never had and leans into its offensive utility roles more, I like the concept

This would get
vetoed, STAB BoltBeam with the Sheer Force boost on 130 Speed is too good of an offensive profile, even with the Rocks weakness. Remove Ice Beam and it should be fine, since it still has the much weaker Tera Blast

Fast Special Attacking Grounds are seldom seen and the type pairs very well with both Fire and Fairy, so this should be quite good. Also definitely agree with removing Will-O, confusions with that would be super annoying with 128 Speed

Already commented on this on Discord, is a pretty neat physical wall, not much else to say

Pretty scary BoltBeamer with its high power Ice STABs and ability to go physical or special, but only having 90 offenses and still dying instantly to anything should keep it in check, even considering how (fittingly) nuclear Explosion is

Looks fine a fine tank, like a Ground-type Heatran. Because of that comparison, I'm thinking that you could potentially give this Stealtk Rock for some extra utility out of your Ground-type, since you are spending your Tera to have this instead of using OU's many other Ground. Also it's mildly amusing that this goes from being immune to Water to weak to Water, you can play mindgames with that maybe

Already commented on this in Discord and I'm still waiting on other thoughts from council, but yeah the Defense drop effect from Jumpscare does scare me (pun intended) a bit, since Weavile is so fast and its offensive profile is so good, which lets it force switches very easily for free Knocks or Swords Dances. The fact this de-incentivizes setting hazards is an interesting dynamic, but could also potentially be too strong, so we'll have to see
And that's it!
See you tomorrow for voting!