Dream Eater

The 'Dream Eaters] (ドリームイーター) are the new enemies that appear in Kingdom Hearts 3D: Dream Drop Distance. There are two types of Dream Eaters: ones that "eat dreams and plant nightmares", referred to as Nightmare Dream Eaters, and ones that "eat nightmares", referred to as Spirit Dream Eaters. The Dream Eaters are the form darkness takes in the sleeping worlds as Heartless and Nobodies cannot enter.

Appearance
Dream Eaters, as stated, have two species — Spirits and Nightmares. They all seem to be animal-based, similar to some Heartless. Spirits are usually light-colored and have black eyes with various shaped pupils. Nightmares are usually darker in coloration, similar to a Heartless's palette, but their glowing eyes are red and get darker towards the center

There many different types of Dream Eaters, but they can help provide Sora and Riku with abilities as well as aid in combat. Additionally, the colors of your party's Dream Eaters can be customized.

Gameplay
Basically these cute ass mofos ova here bring shit dothat stupid ass cat be dancing over the fucking field like we are in The Sound of Music. No bitch. Also these bitches do fusion ha all over the fucking place making fucking rainbows and shit appearing out of their asscracks and shizz and you would either be like "oooooh purty" or like "da fuq?" I swear to black jesus this shit is cray cray all the way way.

Notes and references
Dream Eater Dreameater