Shadow Doopliss

Shadow Doopliss is Doopliss' clone created by the Shadow Queen to destroy Luigi and keep him from saving Mario. After being defeated in the Haunted Amusement Park, he gives Luigi the key to the eighth mansion. He is later seen in the Palace of Shadow as Ultimate Shadow Doopliss alongside Shadow Kingfin and the Shadow Koopalings who are also in ultimate forms.

Shadow Doopliss
Shadow Doopliss is a clone created by the Shadow Queen to keep Luigi from finding his brother. He is stationed in the haunted amusement park's Creepy Steeple Tower attraction. After being defeated, he gives Luigi the key to the eighth mansion.

Ultimate Shadow Doopliss
Ultimate Shadow Doopliss is Shadow Doopliss powered up by the Shadow Queen and is stationed in the Dark Hallways to keep Luigi from getting to the Shadow Queen herself. After being defeated, he vanishes into thin air. He is not seen again after that except for in the minigame "Freak-in-a-Sheet."