Hey Israel, me and Nacho were wondering if you would fix our deck I (Jesus) personally think that it needs some improvement. Please don't pull any tricks on us.

 pokemon: 16
4x Jigglypuff 
3x Wigglytuff 
2x Scyther 
2x Hitmonchan
2x Electabuzz 
2x Mewtwo 
1x Chansey 

trainers: 27
3x professor oak 
2x Bills 
3x Erika 
3x Imposter Oak's Revenge 
4x Plus Power 
3x Item Finder 
2x Gust of Wind 
2x Nightly Garbage Run 
2x Comp. Search 
3x Challenge! 

energy: 17
3x Lighting Energy 
3x Fighting Energy
3x Psychic Energy
4x Rainbow Energy
4x Double Colorless Energy

Jesus,

You have enough pokemon, but with the release of Neo Genesis you'll need a lot of changes.
If you still want to play with a Wigglytuff after the release of NEO you're going to have to play at least three stadiums to deal with Sprout Tower (Ecogym is about your best answer).

With the release of NEO I don't think that players will continue to use Scyther because of the baby pokemon, and there's a new replacement for Hitmonchan too.

Pokemon: (16) 
3x Jigglypuff 
3x Wigglytuff 
2x Cleffa (The best baby pokemon in the set) 
2x Gligar
3x Electabuzz
2x Mewtwo 
1x Chansey

Like I said before you need at least three Ecogym to deal with the Sprout Tower, and a couple of changes with the other trainers. I don't think that you need to play with two Nightly Garbage Run with Ecogym, and the third Computer Search will help you get to the Ecogyms.

Trainers: (27)
3x professor oak
3x Erika
3x Imposter Oak's Revenge
3x Plus Power
3x Item Finder
2x Gust of Wind
1x Nightly Garbage Run
3x Computer Search
3x Challenge!
3x Ecogym

I can't find anything wrong with the energy so let's leave it the way it is.

Energy: (17)
3x Lighting Energy
3x Fighting Energy
3x Psychic Energy
4x Rainbow Energy
4x Double Colorless Energy