[RATE MY TEAM] Mega Venusaur Team

[cfencl]

Hi everybody, thank you for the helpful advice. How about this team. This is for double battles in Pokemon Ultra Moon VGC. Thoughts? 

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1. Venusaur-Mega= Holding Venusaurite
   
   1. Ability= Chlorophyll/Thick Fat
      
   2. Nature= Modest
      
   3. Giga Drain
      
   4. Sludge bomb
      
   5. Leech seed
      
   6. Synthesis
      
2. Garchomp= Holding Groundinium Z
   
   1. Ability= Rough skin
      
   2. Nature= Jolly
      
   3. Earthquake
      
   4. Dragon claw
      
   5. Stealth rock
      
   6. Sword’s Dance
      
3. Greninja= Holding Life Orb
   
   1. Ability= Protean
      
   2. Nature= Timid
      
   3. Scald
      
   4. Ice beam
      
   5. Dark pulse
      
   6. U turn
      
4. Arcanine= Holding Aguav Berry
   
   1. Ability= Intimidate
      
   2. Nature= Adamant
      
   3. Flare blitz
      
   4. Wild charge
      
   5. Extreme speed
      
   6. Roar
      
5. Sylveon= Holding Leftovers
   
   1. Ability= Pixilate
      
   2. Nature= Bold
      
   3. Hyper Voice
      
   4. Protect
      
   5. Wish
      
   6. Heal Bell
      
6. Skarmory= Holding leftovers
   
   1. Ability= Sturdy
      
   2. Nature= Bold
      
   3. Brave Bird
      
   4. Defog
      
   5. Roost
      
   6. Spikes