Gen 9 OU, Azumarill offensive

Question

Format: Gen 9 OU

Breloom @ Leftovers
Ability: Technician
Tera Type: Fighting
EVs: 252 HP / 252 Atk / 4 SpD
Adamant Nature
- Mach Punch
- Bullet Seed
- Spore
- Swords Dance

Volcarona @ Life Orb
Ability: Flame Body
Tera Type: Bug
EVs: 252 SpA / 4 SpD / 252 Spe
Modest Nature
IVs: 0 Atk
- Fiery Dance
- Bug Buzz
- Giga Drain
- Quiver Dance

Azumarill @ Sitrus Berry
Ability: Huge Power
Tera Type: Water
EVs: 252 HP / 252 Atk / 4 SpD
Adamant Nature
- Aqua Jet
- Play Rough
- Superpower
- Belly Drum

Corviknight @ Leftovers
Ability: Pressure
Tera Type: Steel
EVs: 248 HP / 8 Atk / 252 SpD
Careful Nature
- Iron Head
- Body Press
- Iron Defense
- Roost

Glimmora @ Life Orb
Ability: Toxic Debris
Tera Type: Rock
EVs: 192 Def / 252 SpA / 66 Spe
Modest Nature
IVs: 0 Atk
- Power Gem
- Sludge Bomb
- Dazzling Gleam
- Earth Power

Hydreigon @ Choice Scarf
Ability: Levitate
Tera Type: Dragon
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
IVs: 0 Atk
- Draco Meteor
- Dark Pulse
- Flamethrower
- Surf

Breloom is a physical attacker that sleeps and sweeps. He sets up with Spore, spams Swords Dance, and then uses Mach Punches or Bullet Seeds (whichever has the most advantage). Technician to boost its attacking moves, and Leftovers for more bulk.
Volcarona exists to deal with steel, psychic, and dark types. It sets up with Quiver Dance and then uses Fiery dance or Bug Buzz to deal damage with STAB, and uses Giga Drain to recover health from the pesky water and rock-types that annoy it. Life Orb for extra sweeping potential, and Flame Body to disturb the physical attackers that put it at risk.
Azumarill is a bulky sweeper that uses Belly Drum to boost its attack to the moon. Aqua Jet and Play Rough for STAB, with Aqua Jet giving it priority. Superpower for high damage. Sitrus Berry to recover HP from Belly Drum, Huge Power for the huge power it offers.
Corviknight is a wall that deals with fairy-types. Iron Defense for defense boosts, Roost to stay on the field, Iron Head for STAB and flinches, and Body Press to capitalize on its boosted defense. Leftovers for bulk, Pressure because Pressure is the best ability Corviknight can have.
Glimmora is a special sweeper with relative bulk. Power Gem and Sludge Bomb for STAB, Dazzling Gleam for coverage, Earth Power for coverage against electric and poison types. Toxic Debris for hazards, Life Orb for sweeping potential.
Hydreigon is yet another special sweeper that focuses on speed. With the Choice Scarf, it can outspeed almost anything. Draco Meteor for high damage and STAB, Dark Pulse for flinches and STAB, Flamethrower and Surf for coverage.

Answer 1

Breloom: Replace leftovers with loaded dice to get 4-5 hits with bullet seed. The rest is fine

Volcarona: Replace leftovers with heavy duty boots to avoid stealth rock damage and also use tera grass instead of tera bug

Azumarill: all i can really say is that is the best (in my opinion of course) azumarill set

Corviknight: I'd use u-turn instead of iron defense to gain some momentum and also covert cloak as you have no cloak user to take garganacl salt cure.

Glimmora: use 252 hp and 252 sp(ecial) at(tac)k and 4 speed, use (stealth) rocks over dazzling gleam, also ush (focus) sash over l(ife)o(rb). Reasoning is that glimmora is mostly used to set up hazards with it's ability and rocks/spikes (i choose rocks to disappoint charizard fans).

Hydregion: set is fine but i really like focus energy, draco (meteor), dark pulse, and flamethrower. Very cheesy

Anyway hope I could help!