Say I played Mimikyu V and used its "Dummy Doll" Ability on my turn. Then on my opponent's next turn, they play a Path to the Peak stadium. Does that cancel the effect of "Dummy Doll"?
Since the Dummy Doll Ability activated and placed an effect before Path to the Peak came into play, its effect remains.
Source: TPCi Rules Team (2021-07-01)

Relevant cards

Note: All applicable cards may not be listed below.
SWSH5_62
SWSH5_62
SWSH6_148
SWSH6_148