Intruder Alarm and Hushwing Gryff on the battlefield.
Steps
Intruder Alarm's first ability prevents creatures from untapping during their controller's untap step.
Because Hushwing Gryff prevents abilities from triggering whenever a creature enters the battlefield, Intruder Alarm's second ability does not trigger to untap them.
Results
Creatures do not untap during their controller's untap step.