Pokémon
Grimer x2
Koffing x2
Muk x2
Weezing x2
Trainers
Potion x2
Poké Ball x2
Rocky Helmet x2
Professor's Research x2
Koga x2
Leaf x2
Strategy
The best thing you can do with this deck is that you can equip Weezing with a helmet in an active position and have Muk charging energy on the bench, with Weezing you poison and change to Muk to take advantage of its damage bonus for poisoned pokemon.
The support cards are Koga, Leaf, which will allow you to change position Pokémon, the best is Koga, since it returns it to your hand and allows you to summon it full life again.