Postwick (Journey Together 154/159)

Rules

Attacks used by Hop's Pokémon (both yours and your opponent's) do 30 more damage to the opponent's Active Pokémon (before applying Weakness and Resistance).

You may play only 1 Stadium card during your turn. Put it next to the Active Spot, and discard it if another Stadium comes into play. A Stadium with the same name can't be played.