Here is some information about them.
Snugllow. The Dream Pillow Pokemon. Fairy type. Pokédex entry: This strange Pokemon possesses the ability to put people into a deep sleep, similar to Darkrai.
Flufoze. The Dream Follower Pokemon. Fairy type. Pokédex entry: Flufoze uses the power of Cresselia and Darkrai to adopt new forms. When it absorbs energy from someone who has been put to sleep by Darkrai, it becomes its Nightmare Form. When it comes in contact with someone who has been awakened from Darkrais curse by Cresselia, it absorbs the energy from Cresselia, causing the person to fall back into a deep sleep, along with Flufoze going into its Dream Form. When it goes too long without any of this energy, it permanently gets stuck in its Dreamless Form.
by Capital-Bat9971