Pokémon
Nidoran♂ x2
Nidorino x2
Nidoking x2
Koffing x2
Weezing x2
Trainers
Koga x2
Sabrina x2
Poké Ball x2
Red Card x2
Professor's Research x2
Strategy
Both Koffing or Nidoran ♂ can be used to start. If Weezing is available early, evolve and use it to tank early hits while putting energy into Nidoran ♂. If starting with Nidoran ♂, evolve it and use it to tank while dealing damage. During this time, you should be able to build another Nidoking or Weezing for late game.
Use Koga to "heal" your Weezings to continue tanking hits. Red Card can slow down any deck that requires setups. (e.g. Mewtwo ex with Gardevoir setup) X Speed can be used instead of Red Card for free early swaps.
Sabrina can bait out weaker Pokemon to finish off, or cause Pokemon with high retreat costs to stay active and get poisoned. (e.g. Lapras ex, Venasuar ex, anything with 3+ retreat cost)
Best against Mewtwo ex, winnable against almost all other decks including Marowak ex & fighting decks.