If I use Boost Shake to evolve Togetic into Togekiss, can I use Togekiss' "Precious Gift" ability, or does the effect of Boost Shake prevent me from doing so?
Precious Gift takes place at the end of the turn, so you still get to do it after using Boost Shake.
Source: TPCi Rules Team (2024-01-11)

Relevant cards

Note: All applicable cards may not be listed below.
SV3_85
SV3_85
SWSH7_142
SWSH7_142