If I have Milotic with "Dew Guard" Ability in play, what happens if my opponent plays Riley?
Your opponent reveals the top 5 cards of their deck but you would not choose 2 cards, and they get to put all 5 cards into their hand.
Source: TPCi Rules Team (2022-09-29)

Relevant cards

Note: All applicable cards may not be listed below.
SWSH7_38
SWSH7_38
SWSH11_166
SWSH11_166