This is my first OU team and I need some advice to improve my team
https://pokepast.es/e477236db5357249
Dragonite @ Dragon Gem
Ability: Multiscale
EVs 78 Atk 252 SpA 180 Spe
Rash Nature
IVs 31 HP 31 Atk 31 Def 31 SpA 31 SpD 31 Spe
- Draco Meteor
- Extreme Speed
- Flamethrower
- Superpower
Serperior @ Leftovers
Ability: Contrary
EVs 252 HP 6 SpA 252 Spe
Timid Nature
IVs 31 HP 31 Atk 31 Def 31 SpA 31 SpD 31 Spe
- Leaf Storm
- Hidden Power
- Substitute
- Dragon Pulse
Nidoking @ Focus Sash
Ability: Sheer Force
EVs 6 HP 252 SpA 252 Spe
Modest Nature
IVs 31 HP 31 Atk 31 Def 31 SpA 31 SpD 31 Spe
- Earth Power
- Ice Beam
- Sludge Wave
- Flamethrower
Darmanitan @ Choice Scarf
Ability: Sheer Force
EVs 6 HP 252 Atk 252 Spe
Jolly Nature
IVs 31 HP 31 Atk 31 Def 31 SpA 31 SpD 31 Spe
- Flare Blitz
- U-turn
- Rock Slide
- Zen Headbutt
Rotom-Wash @ Leftovers
Ability: Levitate
EVs 252 HP 78 Def 180 SpD
Calm Nature
IVs 31 HP 31 Atk 31 Def 31 SpA 31 SpD 31 Spe
- Volt Switch
- Hydro Pump
- Defog
- Toxic
Ditto @ Choice Scarf
Ability: Imposter
EVs 252 HP
IVs 31 HP 31 Atk 31 Def 31 SpA 31 SpD 31 Spe
- Transform