Dummy Schwer-Muta is an enemy in Rosenkreuzstilette Freudenstachel, modeled after Schwer-Muta Casasola Merkle and based on after the fake Lemmy/Wendy Koopa dolls that appear during their boss fights in Super Mario World.
Every time Schwer-Muta comes out of her pipes two copies of her will come out as well. They will hurt Freudia/Pamela on contact, but can be destroyed easily. If they aren't destroyed, they will retreat when Schwer-Muta does. During the second phase of the fight they will attack from the top pipes using Geisterwand.
Prior to the boss door to Schwer-Muta in the Zeppy Ruins, there are several Dummy Schwer-Mutas in green boots. If they are destroyed they will leave behind their boots which Freudia/Pamela can use to cross spikes. They are a reference to Super Mario Bros. 3.'s Goomba's Shoe item, minus the windup handle on the back.