x2CoilDuring your next turn, this Pokémon's attacks do 90 more damage to your opponent's Active Pokémon (before applying Weakness and Resistance).
Burning TrainWhile its burning body is already dangerous on its own, this excessively hostile Pokémon also has large and very sharp fangs.
If I used Sandaconda's "Coil" attack and my opponent retreats their Active Pokemon, do I still do an extra 120 damage to the new Defending Pokemon?
Yes. The attack states "your opponent's Active Pokemon". That is referencing any Pokemon that is in their Active Spot.