Gen 8 DD 3 attacks Gyara

Pe$o Pete (Gyarados) @ Lum Berry
Ability: Moxie
Shiny: Yes
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Waterfall
- Power Whip
- Earthquake
- Dragon Dance

Magic Bounce (Hatterene) (F) @ Expert Belt
Ability: Magic Bounce
EVs: 252 HP / 252 SpA
Modest Nature
IVs: 0 Atk
- Mystical Fire
- Giga Drain
- Psychic
- Dazzling Gleam

Big Blue (Seismitoad) @ Leftovers
Ability: Water Absorb
EVs: 248 HP / 252 Def / 8 SpA
Bold Nature
IVs: 0 Atk
- Scald
- Earth Power
- Toxic
- Protect

Kezura (Kommo-o) @ Leftovers
Ability: Soundproof
EVs: 252 HP / 252 Def / 4 SpD
Impish Nature
- Body Press
- Dragon Tail
- Taunt
- Stealth Rock

Rapid Spin (Excadrill) @ Choice Scarf
Ability: Mold Breaker
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Earthquake
- Iron Head
- Rock Slide
- Rapid Spin

Arceus Jr (Silvally) @ Salac Berry
Ability: RKS System
EVs: 4 HP / 252 Atk / 252 Spe
Jolly Nature
- Multi-Attack
- Crunch
- Substitute
- Swords Dance