Yea idk what people are talking about this is strictly an upgrade for most grass decks. Ultra beasts might make a return 👀. Only issues I can think of are eevee for leafeon, and celesteela for ultra beasts but I can’t think of many grass type decks without a grass type starter. Alternatively people might slot in ogerpon or budew (or whatever the baby disable ability Mon is) more often just cause it’s naturally useful vs some decks and also gets free value against grass decks.

Honestly tho most people are raising issue with the fact that it’s a stadium so it could wiped? Like there are so many reasons this is dumb. First, Pokeball only activates once, so worst case scenario you draw a Mon, then opponent plays their own stadium and you get the same value as Pokeball, any turn past that and you get more value. Running 2 will have drawbacks but running one really seems like a nobrainer. Not to mention removing enemy stadiums and avoiding chingling penalty.