The concept was to do damage, especially poisoning, and switch out when they are damaged. Blissey's happy healing can help to heal bench. The three pokemon listed above (except blissey) have zero retreat cost, so i can cycle them. My deck also has rare candy (i can't seem to find anyone selling pokemon breeder), Pokeball, Pokenav, Jirachi, etc. to dig out the pokemon and evolve them into the final forms.
I'm planning to add in a Crobat from the hidden legends series. It also has Triple poison and zero retreat cost. What do you think of this concept?
Also, do you know any other pokemon (excluding Nidoking) with Toxic or Triple poison?