Gremlins 2: The New Batch

After his owner Mr. Wing dies, the mogwai Gizmo becomes the guinea pig of scientists at a lab in the Clamp Center, a state-of-the-art highrise building in Manhattan, owned by eccentric billionaire Daniel Clamp. At the mercy of the chief researcher Dr. Catheter, Gizmo is rescued by his former owner Billy Peltzer and his fiancée Kate, both of whom work elsewhere in the building. Clamp befriends Billy upon being impressed by his skills in concept design, also sparking the interest of Billy's superior Marla Bloodstone. Gizmo is left in the office, where water spills on his head from a broken drinking fountain and spawns four new mogwai, one of them being Mohawk, a reincarnation of Stripe. They detain Gizmo in the air vents and later eat at the building's food court after midnight, becoming gremlins.