>>53233385the only viable poison deck is galarian weezing, I'm assuming you don't wanna play that
some options (all of these are dark):
galarian slowking vmax does 12 poison
overqwil does 5 poison for 1 colorless
toxapex does 12 poison for 1 dark
drapion vstar can poison without attacking with his vstar ability
garbodor v could also be an option to stop the opponent from just retreating
poison is literally worthless now because of scoop up nets, it will still be kinda bad after rotation because switching items will be plenty but you could still try memeing around I guess