A Semi-Stall

Heatran (M) @ Leftovers
Trait: Flash Fire
EVs: 252 HP / 248 SDef / 8 Spd
Calm Nature (+SDef, -Atk)
- Flamethrower
- Roar
- Stealth Rock
- Will-O-Wisp

Roserade (M) @ Leftovers
Trait: Natural Cure
EVs: 252 HP / 252 SDef / 4 Spd
Calm Nature (+SDef, -Atk)
- Leaf Storm
- Sleep Powder
- Toxic Spikes
- Rest

Gastrodon (M) @ Leftovers
Trait: Storm Drain
EVs: 252 HP / 4 Def / 252 SDef
Calm Nature (+SDef, -Atk)
- Scald
- Ice Beam
- Toxic
- Recover

Skarmory (M) @ Leftovers
Trait: Sturdy
EVs: 252 HP / 216 Def / 40 Spd
Impish Nature (+Def, -SAtk)
- Brave Bird
- Spikes
- Roost
- Whirlwind

Gengar (M) @ Leftovers
Trait: Levitate
EVs: 4 HP / 252 SAtk / 252 Spd
Timid Nature (+Spd, -Atk)
- Shadow Ball
- Focus Blast
- Pain Split
- Substitute

Reuniclus (M) @ Leftovers
Trait: Magic Guard
EVs: 248 HP / 252 Def / 8 Spd
Bold Nature (+Def, -Atk)
- Psyshock
- Focus Blast
- Calm Mind
- Recover