Poisoned and Burned Pokmon have damage counters placed on them, Asleep and Burned Pokmon toss a coin to check if they are cured, and Paralyzed Pokmon are cured (if the previous turn was that Pokmon's player's)
Unsurprisingly, its exclusivity makes this card very difficult to track down, but there are a few sales across the condition spectrum on TCGplayer
Theres nothing mystical or conspiratorial about the fact that I havent pulled the Full Art Umbreon after 80 packs
That being said, I really cant see this Stage 2 Gengar ex actually being useful in a Pokemon TCG battle
10s make a meaningful impact on any game regardless of when you play them and are extremely tough to beat
Its also interesting that you can move the counters to another creature when it dies, so you can mimic the Arcbound Ravager modular dynamic of attacking and transferring the counters to an unblocked creature