poison pokemon card A HUGE Change is Coming to Types in the TCG! (Sword & Shield TCG) Darkness Ability More Poison Put 2 more damage counters on your opponents Poisoned Pokémon during Pokémon Checkup Pecharunt | Trainers Website

There is no rule text stating that these activations don't stack

This archetype may be used by the pilot specifically to disrupt powerful opponents by adding elements of chance and unpredictability to the game, which their own deck is better able to navigate, or may simply seek to create unexpected and unique board states that rarely exist in other games of Magic

But which one should you choose

I personally like ~4 haste-enablers in the deck

Its most famous sale happened in July 2021, when Logan Paul purchased a PSA 10-graded copy for $5.275 million, setting a Guinness World Record for the most expensive Pokmon trading card sold at a private sale