Thread:CSaPForumWall/@comment-26374068-20170819050742/@comment-26374068-20170822223743

The Floro Sprouts may control the mind, but they also wipe the previous memories of the person clean. As well as hypnotism, Nastasia's powers are also referred to as brainwash much more. This type of hypnotic brainwash turned Luigi into Mr. L, a persona that shared no cognitive recollection of any past events. And even when the hypnotism was broken, he still had no memory of Mr. L. The Floro Sprouts did something similar—not only did they turn Luigi back into Mr. L, but they bent him to his will, calling Dimentio his master.

Even without that, Dimentio can create Pixl vessels like his father did, steal Bill's soul, and imprison it in a Pixl, wiping his memory clean. So Dimentio has two ways of messing with memories.