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 their Active Pokémon.

SmackAs it twirls like a dancer, a sweet smell spreads out around it. Anyone who inhales the scent will feel a surge of happiness.
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.