Electro RK9

   I play this deck at a tournament where everyone plays Magmar, Electabuzz, and Scyther. Help me Ness. No one plays Aerodactyl, luckily. Everyone plays Erika's Dratini, so I decided I'd play evolution. How can I make this deck better? Ditto and Clefable hurt the deck, but no one plays either of them. I had a default gym but everyone by me only plays Narrow or Rocket's Secret Training Gym.

Pokémon (15)
3x Growlithe
3x Arcanine
2x Magmar (fossil)
1x Magmar (neo)
3x Rocket's Zapdos
1x Scyther
2x Cleffa

Trainers (26)
3x Professor Oak
3x Bill
3x Computer Search
3x Super Energy Removal
3x Energy Removal
3x Lass
2x Item Finder
2x Gust of Wind
2x Switch
1x Nightly Garbage Run
1x Pokémon Trader

Energy (19)
8x Fire Energy
8x Lightning Energy
3x Double Colorless Energy

Strategy
Get Arcanine out fast, Lass if it's built up. Nice combo. Rocket's Zapdos is back-up, and builds itself fast. Plasma is nice with Super Energy Removal. You have the right idea.

Pokémon
Your Pokémon line is absoloutley perfect. Since you don't play against much Clefable or Ditto, you can get away with it.

Trainers
You're forgetting a trainer that would work perfect with Rocket's Zapdos and Arcanine: Gold Berry. They both damage themselves! Play three! Drop a Super, your deck needs a lot of energy for Arcanine. Drop a Lass, two will work. If your environment has no effective gyms, than maybe you can get away with no default gym. You don't need Gust of Wind, that much, since Arcanine and Rocket's Zapdos can KO almost anything before it has a chance to retreat, so play only one.

Energy
Perfect.

Revised Electro RK9
Pokémon (15)
3x Growlithe
3x Arcanine
2x Magmar (fossil)
1x Magmar (neo)
3x Rocket's Zapdos
1x Scyther
2x Cleffa

Trainers (26)
3x Professor Oak
3x Bill
3x Gold Berry
3x Computer Search
3x Energy Removal
2x Super Energy Removal
2x Lass
2x Item Finder
2x Switch
1x Gust of Wind
1x Nightly Garbage Run
1x Pokémon Trader

Energy (19)
8x Fire Energy
8x Lightning Energy
3x Double Colorless Energy

You had the right idea. If you run into Ditto or Clefable you'll need to fix this deck differently.  If gyms like EcoGym or No Removal Gym are hurting your trainers, put it a Narrow.

-Ness