If I have Milotic with "Dew Guard" Ability in play, what happens if my opponent plays Choy?
Dew Guard prevents you from revealing your hand, but your opponent still reveals their hand and draws 3 cards.
Source: TPCi Rules Team (2022-09-29)

Relevant cards

Note: All applicable cards may not be listed below.
SWSH7_38
SWSH7_38
SWSH10_137
SWSH10_137