If you have Plusle in play, whenever your opponent attaches an Energy card from their hand to 1 of their Pokémon, put 2 damage counters on that Pokémon. The effect of Buddy Pulse doesn't stack.
Once during your turn, if this Pokémon is in the Active Spot, you may look at the top 6 cards of your deck, reveal a Pokémon you find there, and put it into your hand. Shuffle the other cards back into your deck.