The team:

H (Heracross) (F) @ Lum Berry
Ability: Swarm  
Level: 50  
EVs: 4 HP / 252 Atk / 252 Spe  
Adamant Nature  
IVs: 31 HP / 31 Atk / 31 Def / 31 SpA / 31 SpD / 31 Spe  
- Megahorn
- Brick Break  
- Swords Dance  
- Earthquake

R (Raikou) @ Magnet
Ability: Pressure
Level: 50  
EVs: 4 HP / 252 SpA / 252 Spe  
Modest Nature  
IVs: 31 HP / 3 Atk / 31 Def / 31 SpA / 31 SpD / 30 Spe  
- Thunderbolt  
- Hidden Power [Ice] 
- Calm Mind
- Thunder

S (Slaking) (M) @ Choice Band 
Ability: Truant
Level: 50  
EVs: 252 Atk / 4 SpD / 252 Spe  
Adamant Nature  
IVs: 31 HP / 31 Atk / 31 Def / 31 SpA / 31 SpD / 31 Spe  
- Return
- Shadow Ball
- Hyper Beam
- Earthquake 

Notes:
- WR run (which used Jolly Heracross and mistakenly used Hardy Slaking): https://www.twitch.tv/videos/1503760575
- Strategy: Heracross beats everything except fliers/Levitators, which Raikou owns. Raikou can CM sweep if Heracross dies to hax while setting up. Slaking cleans up 1v1s quickly. Anabel 1 is a problem. 
- Thunder is good because of Rain Dance and 2v1 Raikou/Slaking situations where Raikou is out and Slaking OHKOs the opposing Pokemon.