When I use Ninetales' "Bright Look" Ability, which player chooses which Pokemon becomes active?
The player using the ability chooses which of his or her opponent's Pokemon becomes active.

Other known variants

x2
-20Bright Look
Once during your turn (before your attack), when you put Luxray GL LV.X from your hand onto your Active Luxray GL, you may switch the Defending Pokémon with 1 of your opponent's Benched Pokémon.

Flash ImpactDoes 30 damage to 1 of your Pokémon, and don't apply Weakness and Resistance to this damage.
Put this card onto your Active Luxray GL. Luxray GL LV.X can use any attack, Poké-Power, or Poké-Body from its previous level.
When I use Ninetales' "Bright Look" Ability, which player chooses which Pokemon becomes active?
The player using the ability chooses which of his or her opponent's Pokemon becomes active.
When Manectric attacks with "Flash Impact", can you choose to put the 20 damage onto Manectric or does it have to be put onto one of your benched Pokemon.
The recoil damage from Flash Impact can be placed on any of your Pokemon, including the one performing the attack.