Trick (And/or Gambit) Cripplers 
Eternatus @ Choice Specs  
Ability: Dragon's Maw  
EVs: 252 HP / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Modest Nature  
IVs: 0 Atk  
- Dragon Energy  
- Trick  
- Final Gambit  
- Shore Up  

Eternatus @ Choice Scarf  
Ability: Scrappy  
EVs: 252 HP / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Final Gambit  
- Toxic / Sticky Web
- Trick  
- Dragon Energy

Eternatus @ Choice Scarf  
Ability: Corrosion  
EVs: 252 HP / 252 Def / 252 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Toxic  
- Trick  
- Final Gambit  
- Shore Up / Sticky Web

No Setup Offense

Eternatus @ Black Sludge  
Ability: Adaptability  
EVs: 252 HP / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Core Enforcer  
- Sludge Wave  
- Blue Flare  
- Taunt / Recover

Eternatus @ Choice Specs  
Ability: Dragon's Maw  
EVs: 252 HP / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Dragon Energy  
- Sludge Wave  
- Blue Flare  
- Volt Switch  

Eternatus @ Black Sludge  
Ability: No Guard  
EVs: 252 HP / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Zap Cannon  
- Magma Storm  
- Taunt / Blizzard / Dynamic Punch
- Recover  

Blame Sevag (Eternatus) @ Pecha Berry
Ability: No Guard  
EVs: 252 HP / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Zap Cannon  
- Magma Storm  
- Focus Blast / Clanging Scales
- Trick

Setup Sweepers

Eternatus @ Life Orb  
Ability: Turboblaze  
EVs: 252 HP / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Modest Nature  
IVs: 0 Atk  
- Quiver Dance  
- Core Enforcer  
- Sludge Wave  
- Blue Flare  

Eternatus @ Life Orb  
Ability: Tinted Lens  
EVs: 252 HP / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Core Enforcer  
- Sludge Wave  
- Nasty Plot  
- Milk Drink

Eternatus @ Flame Orb  
Ability: Flare Boost  
EVs: 252 HP / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Modest Nature  
IVs: 0 Atk  
- Core Enforcer  
- Sludge Wave  
- Blue Flare  
- Quiver Dance  

Eternatus @ Razor Claw  
Ability: Sniper  
EVs: 252 HP / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Focus Energy  
- Draco Meteor  
- Overheat  
- Sludge Wave  

Trappers / Hazard Support
Eternatus @ Black Sludge  
Ability: Turboblaze  
EVs: 252 HP / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Glare/Spikes
- Sludge Wave / Core Enforcer
- Milk Drink  
- Volt Switch  

Eternatus @ Leppa Berry  
Ability: Sticky Hold  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Jolly Nature  
- Anchor Shot  
- Spectral Thief  
- Shore Up  
- Recycle  

Eternatus @ Black Sludge  
Ability: Magic Bounce / Unaware
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Jolly Nature  
- Anchor Shot  
- Imprison  
- Transform  
- Knock Off / Core Enforcer / Recover

Eternatus @ Leftovers  
Ability: Corrosion  
EVs: 252 HP / 252 Atk / 252 Def / 252 SpD / 252 Spe  
Jolly Nature  
- Toxic  
- Gastro Acid  
- Anchor Shot  
- Milk Drink