Name of the Pokemon: Gigantamax Coalossal
Role(s): Hazard Stacking (Contrary), Hazard Setter (Spikes and Rocks), Hazard Removal
Type: Fire/Bug
Abilities: Contrary / Solid Rock / Flash Fire
Stat Distribution: 120/120/80/80/120/80 (600)
Movepool Additions: Leech Life, Topsy-Turvy, Close Combat
Justification: Coalossal is an interesting addition because it can boost Evasion with Defog predicts and also Defenses with Contrary Close Combat, making it very hard to kill. However, it has no way of boosting its Attack, thus requiring Hazards to worn out foes to get KOs. Solid Rock also lets Coalossal fit in the Hazard Stacking archetype, but as a Rapid Spinner and Hazard Setter instead of an abuser. Rapid Spin and Contrary don't go well together. Flash Fire gives it an immunity, but doesn't synergize well with the rest of its kit, it's a niche option. Topsy-Turvy was added as a niche option against opposting Set-up Sweepers.
With a Bug secondary typing, it beats Orbeetle with Bug STAB, and resists Zacian's STABs and gains an Attack boost off of its Intimidate. Bug also gives it neutral against Ground, which will probably be valuable seeing all Ground mons we have. Coalossal can also get Speed boosts off of Cotton Down Dubwool, avoiding doubled BP.
Stonjourner, Seismitoad and Walrein beat it.
Name of the Pokemon: Vibrava (Eviolite Compatible)
Role(s): Trapper, Offensive Pivot, Stallbreaker, Hazard Removal
Type: Dark/Bug
Abilities: Desert Trap/Levitate/Mold Breaker
Stat Distribution: 80/115/80/60/80/65 (480)
Movepool Additions: Stockpile, Power Trip, Sucker Punch, Punishment, Fire Fang, Knock Off
Movepool Removals: None
Custom Elements: Desert Trap: inflicts the Sand Tomb volatile status on the target.
Justification: Vibrava is an interesting trapper that can fit in both offense and stall teams. Sand Tomb's passive damage helps it put foes into KO range, though it also is only a temporary trapping effect. Stockpile in combination with STAB Power Trip offers it an unconventional way of setting up on foes. Eviolite compatibility is nice, but Binding Band sets may be used, which makes it deal 1/6 max HP passive damage per turn, combined with Protect and Roost.
Free the evolved Pinch.
(thanks Brodaha for the Mist idea)
Name of the Pokemon: Altaria
Role(s): Mist Setter, Defensive Pivot, Cleric, Hazard Removal
Type: Flying/Dragon
Abilities: Overcast / Cloud Nine / Natural Cure
Stat Distribution: 75/110/110/110/105/80 (590)
Movepool Additions: Dragon Ascent
Movepool Removals: Dragon Dance
Custom Elements: Overcast: On switch-in, this Pokemon summons Mist for 5 turns (8 turns with Dawn Stone) on the user's side of the field. Mist now also prevents self-inflicted stat drops.
Justification: Altaria can support the team in numerous ways, having access to Heal Bell, Defog, Haze, its own auto field effect and a status sponge ability. It lacks regular Altaria's set-up capabilities but doesn't suffer from being passive, as it has Draco Meteor and Dragon Ascent without downsides.
Altaria pairs well with Zacian, as it gains a Close Combat without Defense drops.
Name of the Pokemon: Registeel
Role(s): Mixed Wall (Stall), Hazards
Type: Steel
Abilities: Mirror Armor / Early Bird / Oblivious
Stat Distribution: 80/75/150/75/150/50 (580)
Movepool Additions: Assimilation, Gyro Ball
Movepool Removals: None
Custom Elements: Assimilation: Steel-type Spectral Thief.
Justification: The idea was to replace the usual Haze you see on walls with another move that removed stat boosts. With Assimilation, Registeel becomes a set-up deterrent. It has the usual Registeel stats with a great tool at its disposal. Beats Intimidate Zacian with Mirror Armor. A set with Early Bird + Rest
may be viable, but I wouldn't call it reliable. With Oblivious, Registeel becomes untauntable as a Rocks setter and RestTalk user, but loses out on the quicker Rest or stat drop bouncing.