SandStall Test?

Tyranitar (F) @ Assault Vest
Ability: Sand Stream
Shiny: Yes
EVs: 252 HP / 4 Atk / 252 SpD
Sassy Nature
- Crunch
- Earthquake
- Rock Slide
- Fire Blast

Hippowdon (F) @ Leftovers
Ability: Sand Stream
Shiny: Yes
EVs: 252 HP / 4 Atk / 252 Def
Impish Nature
- Stealth Rock
- Slack Off
- Earthquake
- Roar

Venusaur (F) @ Venusaurite
Ability: Chlorophyll
Shiny: Yes
EVs: 228 HP / 252 SpA / 24 Spe
Serious Nature
- Hidden Power [Fire]
- Giga Drain
- Sludge Bomb
- Synthesis

Heatran (F) @ Choice Scarf
Ability: Flash Fire
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
IVs: 30 SpA
- Lava Plume
- Earth Power
- Flash Cannon
- Toxic

Gliscor (F) @ Toxic Orb
Ability: Poison Heal
Shiny: Yes
EVs: 248 HP / 188 Def / 72 Spe
Impish Nature
- Protect
- Roost
- Earthquake
- Knock Off

Gastrodon (F) @ Leftovers
Ability: Storm Drain
EVs: 252 HP / 252 Def / 4 SpD
Bold Nature
- Scald
- Ice Beam
- Toxic
- Recover