Greedent @ Liechi Berry  
Ability: Cheek Pouch 
EVs: 248 HP / 8 Def / 252 SpD  
Careful Nature  
- Stuff Cheeks  
- Last Resort / + Protect
(could transpose into an actual set with 3 other moves; great if they expect belly custap)

Greedent @ Custap Berry  
Ability: Gluttony  
EVs: 252 HP / 4 Def / 252 SpD  
Sassy Nature  
IVs: 0 Spe  
- Belly Drum  
- Gyro Ball  
- Giga Impact  
- Earthquake
(great if they expect last resort)

Grafaiai @ Normal Gem  
Ability: Unburden
EVs: 248 HP / 252 Def / 8 SpD  
Relaxed Nature  
- Cross Poison  
- Foul Play  
- Endeavor  
- Poison Fang
(Improvements on endeavor Grafaiai)

Grafaiai @ Normal Gem  
Ability: Unburden
EVs: 248 HP / 32 Atk / 16 Def / 196 SpD / 16 Spe  
Adamant Nature  
- Poison Fang  
- Substitute  
- Endeavor  
- Giga Impact
(Offensive set)

Grafaiai @ Black Sludge  
Ability: Prankster
EVs: 248 HP / 120 Def / 140 SpD  
Impish Nature / Relaxed
- Super Fang  
- Double-Edge  
- Poison Fang  
- Copycat
(Super fang sets really didn't need normal gem as they didn't need to take damage first unlike endeavor)