For those curious on what abilities exist in the new gen that are relevant to meta...
And of these which are actually important/cool/whatever:
Ice Scales is similar to Fur Coat or Fluffy, but it works with Special moves and halves incoming damage. Psyshock IS counted in this which is unique, so even Psychic special attackers cannot truly bypass Ice Scales. This makes up a fair bit for the lack of Chansey/Blissey in this generation.
Intrepid Sword/Dauntless Shield are completely horseshit and I don't expect at least the former to last, +1 Attack/Defense upon switching in constantly are super strong and can enable instantaneous pressure or an easier switchin depending on which you prefer. +1 Attack is the same as a Choice Band, mind you, but without the locking, making it potentially better than Gorilla Tactics. However, Unaware can fuck Intrepid Sword royally
Libero is Protean. 'nuff said.
Gorilla Tactics is Choice Band in ability form, very reminiscent of the OM with items as abilities. Physical wallbreakers rejoice, for Gorilla Tactics has blessed thee with a boost unblockable by anything outside of Mold Breaker or Neutralizing Gas, as unlike Intrepid Sword this buff cannot be blocked by Unaware. You can combine Scarf with Band, Double Band, Specs for a wallbreaker of unmatched proportions,
Punk Rock is simultaneously a Boomburster's best friend and a Boomburster's second worst nightmare behind Soundproof. As a damage buff and damage resistance, it's strong in the hands of anything that relies on Sound moves in some way for damage. Notable users are Kommo-o with Clanging Scales, Bug Buzz users and Boomburst users. (Do note that while Adaptability sounds like a completely better option, should Punk Rock be 1.2x the scaling of Clanging Scales, for example, would be 1.5x1.2=1.8x damage, while adaptability is 2x. Then Punk Rock also adds a Boomburst resistance, which is useful.)
Neutralizing Gas cancels all abilities. Better than Mold Breaker since it nukes Simple/Immunity to BurnPoisonetc/Ripen/Regenerator/Natural Cure/EVERYTHING, this is THE poster child for things that don't need an ability but like having their checks have their ability removed. It's also effective at stopping -ates, since they suddenly lack the coverage/STAB in their Normal-type moves.
Steam Engine raises Speed by
6 fucking stages if hit by a Water or Fire-type move, effective for any Dragon or Water type (the exclusive resists to both types). Pokemon that don't mind burns and are setup mons can start obliterating by switching into a baited Scald. Hydreigon is a strong example since it now has Nasty Plot and combines all of the perfect things; a speed tier that is usable without Steam Engine, a setup move, strong as hell statline and the movepool to abuse the +6 speed.
Wandering Spirit swaps abilities with a target with contact, which can make for an irritating counter to certain Pokemon that aren't using Neutralizing Gas. Run on Extreme Speed, Shadow Sneak, or Sucker Punch users to steal abilities before a target acts to shut down others for a turn and force a switch.
And some new gen abusers.
Barraskewda- Swift Swim naturally just works well on it, but Adaptability can turn it into an instantaneous nuke once Dynamaxed with Dynamax Liquidation combined with Dynamax Close Combat for the +1 Attack. In the same vein, Intrepid Sword and Gorilla Tactics can combine with Chose Band to make it an immediate wallbreaker who only gets better with Dynamax.
Centiskorch- Full bias that I love this thing, but Magic Guard was pretty much entirely made for this typing and type of Pokemon who lacks a resistance to any form of hazard and lacks consistent recovery. With a Coil set carrying Fire Lash, Leech Life and Will-O or Power Whip for Waters, Centi can form a decent backline against slower and more bulky teams, but with things like Intrepid and Gorilla existing it might be hard for a poor Fire/Bug without a speed boosting move to truly find a place in the meta.
Cursola- Thicc as fuck with Ice Scales, this thing can essentially turn into this generation's Chansey/Blissey replacement but with a form of offense to beat off things that might threaten it. Surge abilities can turn it into a bulky setter for other mons, while Dauntless Shield can turn it into a double-down fat mon. Intimidatingly, Cursola also can function as a lure with a Choice Specs with Shadow Ball, Earth Power, and Ice Beam forming a solid offense that can abuse Protean by nature of just hitting
really hard.
Sirfetch'd- Memes and exclusively memes, but with a statline very similar to Conkeldurr excluding half of the HP but having memes, Sirfetch'd can etch itself out as a physical nuker in a similar vein either taking the route of Intrepid Close Combat, Refrigerate Frustration for a lure set, or just a Banded Gorilla First Impression to catch priority 1 users like
Pinsir-Mega forgot megas don't exist, but you get the idea. Quick Attack/Mach Punch/Sucker Punch beware.
Corviknight- With a statline extremely reminiscent of Skarmory (Corvi 98/87/105/53/85/67 versus Skarm 65/80/140/40/70/70), Corvi manages to scrape into the new gen by nature of its superb typing and access to Bulk Up and Roost to make it a slow, fat mon that can just wall out teams until it gets comfortable. Aerilate gives it proper STAB to abuse, Flash Fire/Volt Absorb are lures that block certain checks with Volt Absorb getting special mention for stopping Galvanize ESpeed.