These are Isle of Armor Regional Variants and Regional Evolutions. If you were hoping for new Pokemon, no attached to an older gen, this is the wrong place for you, tho I did see a dolphin like Pokemon. Anyways, lets do this. Regional Evolutions are denoted with the asterisk symbol btw

Shroomish: Grass/Fairy Type: Ability: Poison Heal; Hidden Ability: Inner Focus
Breloom: Grass/Fairy Type: Ability: Poison Heal; Hidden Ability: Solar Speed: Doubles Speed when in Sunlight
Crabrawler: Ground/Fighting Types: Abilities: Sand Stream and Iron Fist; Hidden Ability: Arena Trap.
*Sesarate: Ground/Fighting Types: Abilities: Sand Stream and Iron Fist; Hidden Ability: Arena Trap
Poliwhirl: Ice Type: Abilities: Swift Swim and Ice Body; Hidden Ability: Water Absorb
Poliwrath: Ice/Dark Type: Abilities: Cutthroat and Ice Body; Hidden Ability: Water Absorb. Cutthroat grants a multiplier of 1.5x to Pokemon if target is Statused
Slowbro: Psychic/Poison Type: Abilities: Solidify and Own Tempo; HA: Regenerator. Solidify, when on the field of battle, turns all Water Type Attacks into Ice Type Attacks. It is not affected by Neutralizing Gas

Now Time for some exclusives. We'll start off with the Sword Exclusives

Seviper: Poison/Ice Type: Ability: Sniper; HA: Infiltrator.
*Snowaconda: Poison/Ice Type: Ability: Sniper; HA: Dasher. Dasher grants a 20% chance to flinch if Pokemon outspeeds the opponent
Clawitzer: Fighting/Water Type: Ability: Desperation. Desperation grants Priority+1 to all special moves when HP is below half

Now its time for the Shield Exclusives

Zangoose: Normal/Steel Type: Ability: Magnet Pull; Hidden Ability: Prankster.
*Brongoose: Normal/Steel Type: Ability: Magnet Pull; Hidden Ability: Cutthroat.
Dragalge: Ghost/Poison Type: Abilites: Poison Touch and Poison Point; Hidden Ability: Perish Body