Discussion Absol's Ability: Dark Ambition (Team Up)

[TSBoom]

Does Absol's ability, Dark Ambition, adds up? If I have two Absols on my bench, do they add two energies in total for the opponent's basic Pokemon to retreat? As a result, Shadow Seeker will add 60 damages in total.

If the ability doesn't add up, I think the description will usually say, "the ability can only be used once per turn".

Judge, question!!!

 

[Otaku]

Ability: Dark Ambition
As long as this Pokémon is in play, your opponent’s Active Basic Pokémon’s Retreat Cost is [C] more.​

It reads like it stacks.