This is for completing:
Level 4
”The Harley And The Ivy”This cannot be missed you will be introduced to a few new Lego game options but nothing too taxing.
*** Spoiler - click to reveal ***As soon as you reach top of the roof with the canapé party and activated the flowers with Ivy, it will kick into a cinematic with Harley Quinn trying to her proof on her phone which fails then the level will end
Then yes pop achievement unlocked.
Congratulations!
Happy Hunting