Polerkitty is the pet of Hellen Gravely, and a boss in Luigi's Mansion 3.
Polterkitty is a purple cat with blue eyes, a white necklace and three long tails.
In the game
Polterkitty will steal the ninth elevator button, Luigi must find her in one of the rooms on floor eight and shock her with the Strobulb the Polterkity will then turn into a huge monster and try to attack Lugi, he must turn away from her and wait until she goes to attack to shock and suck her with the Poltergust. However, only one of her tails will be sucked, she will change back to her normal from and run away. When Lugi finds and shocks her again, she go through the floor into the seventh floor. Lugi must find her in one of the rooms, shock her again and suck up her second tail. When Lugi finds her again in another room and sucks her third tail, she will drop the elevator button. Polterkitty is seen again after Luigi obtains the fourteenth button, but she will be sucked up instead of her tail.