A great strategy I thought of: Use a Multi-Scale Dragon Dancing Dragonite in combination with a Magic Mirror Espeon with Yawn.
When the opponent tries to use entry hazards, send out Espeon to reflect the hazards back to them. This also prevents Stealth Rock from cancelling Dragonite's Multi-Scale.
Now, spam Yawn as the opponent either switches their Pokémon around repeatedly and rack up damage on their team by the entry hazards they set up upon themselves, or they'll be forced to knock out Espeon while falling asleep.
Now, send in Dragonite, set up against their sleeping Pokémon and proceed to deal a significant amount of damage to the opponent's team. Dragonite is the most effective Pokémon for this strategy as Multi-Scale pretty much guarantees that it cannot be revenge-killed by any single Pokémon other than a Choice Scarf Ononokusu (as Mold Breaker allows its Outrage to bypass Multi-Scale).
Be careful of Lum Berry holders or Pokémon with U-turn though.
When the opponent tries to use entry hazards, send out Espeon to reflect the hazards back to them. This also prevents Stealth Rock from cancelling Dragonite's Multi-Scale.
Now, spam Yawn as the opponent either switches their Pokémon around repeatedly and rack up damage on their team by the entry hazards they set up upon themselves, or they'll be forced to knock out Espeon while falling asleep.
Now, send in Dragonite, set up against their sleeping Pokémon and proceed to deal a significant amount of damage to the opponent's team. Dragonite is the most effective Pokémon for this strategy as Multi-Scale pretty much guarantees that it cannot be revenge-killed by any single Pokémon other than a Choice Scarf Ononokusu (as Mold Breaker allows its Outrage to bypass Multi-Scale).
Be careful of Lum Berry holders or Pokémon with U-turn though.