Intimidate/trick room

Mawile @ Mawilite
Ability: Intimidate
EVs: 252 HP / 252 Atk / 4 SpD
Adamant Nature
- Fire Fang
- Sucker Punch
- Play Rough
- Iron Head

Salamence @ Yache Berry
Ability: Intimidate
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
- Draco Meteor
- Dragon Pulse
- Fire Blast
- Protect

Gyarados @ Wacan Berry
Ability: Intimidate
EVs: 4 HP / 252 Atk / 252 Spe
Jolly Nature
- Earthquake
- Waterfall
- Stone Edge
- Dragon Dance

Gardevoir @ Sitrus Berry
Ability: Trace
EVs: 252 HP / 252 SpA / 4 SpD
Modest Nature
IVs: 0 Spe
- Trick Room
- Shadow Ball
- Psychic
- Moonblast

Venusaur @ Leftovers
Ability: Overgrow
EVs: 252 HP / 128 SpA / 128 SpD
Modest Nature
- Sludge Bomb
- Giga Drain
- Sleep Powder
- Leech Seed

Conkeldurr @ Life Orb
Ability: Iron Fist
EVs: 252 HP / 252 Atk / 4 SpD
Adamant Nature
- Drain Punch
- Mach Punch
- Protect
- Poison Jab