SM OU simple team, my first OU team any tips?

[PokeGod915420]

Ferrothorn @ Leftovers
Ability: Iron Barbs
EVs: 200 HP / 72 Atk / 96 Def / 140 SpD
Adamant Nature
- Leech Seed
- Knock Off
- Iron Head
- Spikes

ron weasley (Keldeo) @ Choice Specs
Ability: Justified
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
IVs: 0 Atk
- Hidden Power [Ice]
- Hydro Pump
- Focus Blast
- Secret Sword

Xurkitree @ Psychium Z
Ability: Beast Boost
EVs: 64 HP / 192 SpA / 252 Spe
Timid Nature
IVs: 0 Atk
- Hypnosis
- Tail Glow
- Eerie Impulse
- Thunderbolt

scooby doo (Landorus-Therian) @ Choice Scarf
Ability: Intimidate
EVs: 148 HP / 176 Atk / 184 Spe
Jolly Nature
- Earthquake
- Stealth Rock
- Stone Edge
- Toxic

Medicham-Mega @ Medichamite
Ability: Pure Power
EVs: 124 HP / 204 Atk / 180 Spe
Jolly Nature
- Fake Out
- Zen Headbutt
- High Jump Kick
- Bullet Punch

Gastrodon @ Leftovers
Ability: Storm Drain
EVs: 156 HP / 252 Def / 100 SpD
Relaxed Nature
- Scald
- Sludge Wave
- Earthquake
- Clear Smog

 

[TPP]

Welcome to Smogon! I'm locking your RMT for the time being as the forum rules require that you provide in-depth descriptions for each Pokemon to explain their roles. Please read the rules carefully and take a look at Team Showcase to see the level of detail we require. PM me with updated descriptions and I'll be happy to unlock this.