If I use Steenee's "Captivate" attack while Spikemuth stadium is in play, does the opponent put any damage counters on their Pokemon?
No, Captivate would not trigger Spikemuth since it was not moved during the opponent's turn.
CaptivateSpikemuth


x2
CaptivateSwitch 1 of your opponent's Benched Pokémon with his or her Active Pokémon.

PsychicThis attack does 10 more damage for each Energy attached to your opponent's Active Pokémon.
If I use Steenee's "Captivate" attack while Spikemuth stadium is in play, does the opponent put any damage counters on their Pokemon?
No, Captivate would not trigger Spikemuth since it was not moved during the opponent's turn.