If I have two Team Rocket's Dugtrio with the "Holes" Ability in play and my opponent Retreats their Active Pokemon, do they place 2 or 4 damage counters on it?
They place 4 damage counters. The Ability can stack.
Source: Ascending Heroes FAQ; TPCi Rules Team (2026-01-22)

Relevant cards

Note: All applicable cards may not be listed below.
ME25_101
ME25_101