Some disappointments:
You're supposed to be the mascot, we're supposed to joke that you don't get enough forms yet here you are not learning Extreme Speed.
(Atk <-> Spe)
Gigas is finally unshackled from its attack-halving Slow Start
They stole Tri-Attack (Nature Power) this gen but even then this is just pathetic, I'd expect any fully-evolved normal type to learn Shadow Ball and Ice Beam, now don't get me wrong you still wouldn't be that good even if you had those and Flamethrower but you'd at least be a usable meme. As it stands, you'd better with Regieleki's movepool than your current one.
(SpA <-> Atk)
You're supposed to be the mascot, we're supposed to joke that you don't get enough forms yet here you are not learning Extreme Speed.
(Atk <-> Spe)
Gigas is finally unshackled from its attack-halving Slow Start
They stole Tri-Attack (Nature Power) this gen but even then this is just pathetic, I'd expect any fully-evolved normal type to learn Shadow Ball and Ice Beam, now don't get me wrong you still wouldn't be that good even if you had those and Flamethrower but you'd at least be a usable meme. As it stands, you'd better with Regieleki's movepool than your current one.
(SpA <-> Atk)
Probably the best newcomer of the group- Hasty Avalugg has all the benefits of regular avalugg plus STAB rock moves and a better ice attack in Mountain Gale. It even gets stealth rock, and can ohko special attackers with Mirror Coat! This should be a good gen for this mon. Custap and HDB both strong items.
Archaludon is a strange case, being only decently fast and also not being that frail after the nature swap. I think this mon might actually be better not as a sturdy mon, since Stamina is still pretty nice on it.
Carbink is pretty underrated but should be considered as a good choice for teams- It has both a near-guaranteed trick room with a superpowered misty explosion off of 150spa (covert cloak or mental herb to stop flinches/taunts), or it can choose to be fast and set rocks and then suicide with endeavour + rocky helmet. It can even set trick room for itself and then meteor beam to get a mini-sweep going.
Regirock is the fastest sturdy user of the gen, but it lacks really good offensive power. I considered running White Herb with Curse so you could get something going with your only boosting move, but this mon should really focus on being a cleaner and not a sweeper if running Hasty. Thunder Wave, Rocks, and Explosion could all be last moveslots.
Skarm is another cool suicide lead! You can run Mild for 140 spa, and after being brought to 1HP you can hit them with a Custap berry Steel Beam to keep your Spikes/Stealth Rock on the field.
Im not sure about this guy. I think he'll be better with a Calm or Timid set and focusing on Purifying Salt, cus the ability is really good. His stats arent high enough to offer anything over the above mons as an offensive threat
I think Magnet Pull is probably scarier, but Sturdy could be considered too. It has Counter/Roar + HDB as an option, which is decently strong.
Mild or Rash both hit harder than you might think- it just depends on whether you want to be slightly less physically or specially bulky. Contrary Leaf Storm is always a fun time, and the prevalence of webs on ladder means that you’ll probably end up with +1 speed whenever you send in the snake. I enjoy Tera Stellar for perfect coverage via Tera Blast, but an argument for either Tera Dragon or Tera Electric could be made. Glare + Substitute mean that you’ll probably end up boosting to at least +3 spatk (while healing via lefties) at which point the game is usually about over for your opponent
Quiet DSpeed is a NUKE. One Psycho Boost (especially with Tera Psychic) is enough to drop just about any non-resist not named Blissey/Chansey, and BoltBeam coverage (in the most literal sense possible) ensures that more than half of the game is getting hit for SE and a grand total of 4 mons resist the BoltBeamBoost combo. But what about the fourth move slot and the item? In my opinion that’s where the real fun with this mon begins. You could always run Shadow Ball with Life Orb / Specs and be an all-out attacker (plus BoltBeamBoostBall is just plain fun to say), you could run Knock Off or TWave for utility, the possibilities are endless. My favorite set, however, is Scarf + Trick, as this can REALLY devastate the ever-present Araquanid lead on web teams :3
Hasty sets are FUN. Banded Meteor Mash can sweep if you get lucky with boosts. Fill in the other three slots with a mix of Equake, Psychic Fangs, Ice Punch, Knock Off, and maybe even Explosion if you like gambling. Clear Body ensures that webs (have you noticed a theme yet) and the stray Intimidate don’t get you down. Click buttons, do damage, have fun. Need I say more? Probably, but you’re not my mom & you can’t make me
Ooooh boy this is a versatile fellow. Physical, special, mixed and even bulky are all viable and I’ve seen them all. Personally I enjoy Timid sets as you get perfect coverage between Freeze Dry and Earth Power, and Draco Meteor becomes a nuke off of base 130 spatk especially if you run something like Life Orb (like me!) and/or use Tera Dragon (like me!) There are many options for the fourth moveslot and honestly I like to keep my options open and adjust game to game.
The mon. The myth. The legend. The only pokemon on my team that someone on this thread whined at me about: COMFEY. Triage is always good, even more so when Rash brings you up to 110 base spatk. Calm Mind lets you set up easily cause it’s a Comfey there’s no way that this is a threat! But +4 ultra-priority Draining Kiss hits like, well, a kiss traveling at (roughly) Mach 28, and will heal you back to full on most anything that isn’t both bulky and a resist. I’ve tried both Tera Fire Tera Blast and Giga Drain and had success with both (at least until Tera gets banned lmao) but the fourth move must be stored power. 260 bp move that muscles past even resists cause you’re at +4? Delectable. All hail Comfey and welcome to the luau.
Vikavolt @ Focus Sash 
araq absolutely needs to go, not at all a healthy presence. custap endure spatk is the most consistent set, but everything from choiced to mixed to mirror coat to fast is unhealthy and makes the metagame tilt way too much towards HO
another overwhelming guy, but not nearly as much as araq. eruption is scary, sure, but the main issue is that on top of being broken itself it also enables threats like flutter, gouging, moon and raging bolt which are all already hard to handle in their own right. i'd still say to ban torkoal over heat rock though, since it itself is a broken presence and sun would be pretty balanced without it
you take a metagame with a significantly higher power level than OU without the consistent defenses to counteract it and of course tera is going to feel iffy, though i surprisingly don't dislike it here as much as i tend to in other tiers. I would support a ban, since it just makes threats like Deo-S, Gouging, and Kingambit even more broken without giving enough juice to bulky teams to counteract it. 
Azumarill
Blissey
Chansey
Deoxys-Defense
and Magearna.
