The Dream Eaters (ドリームイーター Dorīmu Ītā ) are a species of creatures that debut in Kingdom Hearts 3D: Dream Drop Distance as a key element in the game. The Dream Eaters are forms that darkness takes when it enters the Realm of Sleep, and so come in two different varieties: the malevolent Nightmares, which eat good dreams and plant bad ones, and the acquaintable Spirits, which only eat bad dreams. Spirits serve as supporting characters that can be tamed by the player while Nightmares are the primary antagonists in the game.
The Dream Eaters are designed after various animals and come in various shapes and colors, more so than the Heartless or other beings of darkness.
To distinguish the two varieties, the two types of Dream Eaters are characterized by their emblem, which signifies whether it is a Spirit or Nightmare, and their color schemes; Spirits have light, pastel color schemes while Nightmares tend to have darker ones. Both species have black lining around their eyes, but Spirits' eyes are colored yellow in contrast with the Nightmares' eyes which are completely red.
Dream Eaters exist only within the Realm of Sleep, feeding on the dreams and nightmares of those who sleep. The behavior of Nightmares is typical of darkness entities, being violent and aggressive, although much more expressive than the the series' previous enemies.
Unlike most creatures made of darkness, Spirits are the polar opposite; they are benevolent and playful, and are willing to assist in any way they can to people who are kind to them. In return, Dream Eaters can share power with one another and with other beings in a variety of ways. Their nature indicates a positive form of darkness often misinterpreted by most enemies that use darkness, in that darkness by default is not a malicious presence despite its appearance.
Kingdom Hearts 3D: Dream Drop Distance
The Dream Eaters appear in the game as the natural embodiments of darkness in the sleeping worlds, worlds that were previously attacked by the Heartless but remained within sleep instead of returning to the Realm of Light. These creatures were born following the defeat of Ansem, Seeker of Darkness, where the Nightmare Dream Eaters took on their Heartless predecessors' role in seeking out the world's keyholes, then promptly consuming it. Sora and Riku encounter the beings while carrying out their Mark of Mastery exam, and with the help of the Spirits and the defeat of the Nightmares, manage to awake the sleeping worlds. Eventually, it is revealed that Riku was within Sora's own dreams since the beginning of the test as a Dream Eater himself. To save Sora from slumber, Riku absorbs all of his Spirits' power in a battle against the Nightmare possessing Sora and wins, allowing Sora to wake up. Afterwards, Sora decides to visit the sleeping Traverse Town again, and he is reunited with all of his Spirit friends he had made on his journey.
Incorporated Films and shorts: Alice in Wonderland | Aladdin/The Return of Jafar | Beauty and the Beast | Cinderella | Fantasia | Hercules | The Hunchback of Notre Dame | Lilo & Stitch | The Lion King | The Little Mermaid | Mickey, Donald and Goofy: The Three Musketeers | Mulan | The Nightmare Before Christmas | Peter Pan | Pinocchio | Pirates of the Caribbean: The Curse of the Black Pearl | Sleeping Beauty | Steamboat Willie | Snow White and the Seven Dwarfs | Tarzan | Tron/Tron: Legacy | The Many Adventures of Winnie the Pooh
Villains: Master Xehanort | Ansem | Xemnas | Maleficent/Dragon Maleficent | Pete | Organization XIII | Vanitas | Xigbar/Braig | Xaldin | Vexen | Lexaeus | Zexion | Saïx/Isa | Demyx | Luxord | Marluxia | Larxene | Terra-Xehanort | Young Xehanort | Xehanort's Guardian
Other Characters: Jiminy Cricket | Naminé | Ansem the Wise/DiZ | Yen Sid | Xion | Axel/Lea | Master Eraqus | Dilan | Even | Aeleus | Ienzo | Lingering Will | Data Sora | Data Riku | Data Naminé | Data Roxas | Hayner | Pence | Olette | Riku-Ansem | Kairi's Grandma | Riku Replica | Anti-Saïx | Anti-Sora | Anti-Riku | Sora-Heartless | Jiminy's Journal
Disney Characters and Villains: Queen Minnie | Daisy Duck | Pluto | Tarzan | Winnie the Pooh | Aladdin | Genie | Tron | Magic Brooms | Peter Pan | Quasimodo | | Merlin | Tigger | Eeyore | Rabbit | Ariel | Mulan | Mushu | Jack Sparrow | Chernabog | Simba | Timon | Pumbaa | Nala | King Triton | Jafar/Genie Jafar | Alice | Cheshire Cat | Jack Skellington | Esmeralda | Phoebus | Beagle Boys | Scrooge McDuck | Huey, Dewey and Louie | Master Control Program | Sark | CLU | Rinzler | Beast | Stitch | Hercules | Tick-Tock the Crocodile | Snow White | Wendy (More coming soon)
Objects: Sea-salt ice cream | Wayfinder | Door to Darkness | Keyblade | X-blade | Mickey's Letters | Thalassa Shell | Kingdom Hearts Encoder | Keychain | Gummi Blocks | Bug Blox | Black coat| | Keyblade Armor
Locations: Land of Departure | Disney Castle | Disney Town | Timeless River | Datascape | Radiant Garden | Keyblade Graveyard | Destiny Islands | Traverse Town | Hollow Bastion | Dive to the Heart | End of the World | Realm of Darkness | Castle Oblivion | Twilight Town | The World That Never Was | Castle That Never Was | Halloween Town | Neverland | Wonderland
Music: Dearly Beloved | Simple and Clean | Sanctuary | Mickey Mouse Club March | Swim This Way | Part of Your World | Under the Sea | Ursula's Revenge | A New Day is Dawning | Destati | Bibbidi-Bobbidi-Boo | He's a Pirate | Beauty and the Beast | This is Halloween | It's a Small World | Night on Bald Mountain | Winnie the Pooh | The Sorcerer's Apprentice | The Pastoral Symphony
Soundtracks: Kingdom Hearts Original Soundtrack | Kingdom Hearts Final Mix - Additional Tracks | Kingdom Hearts II Original Soundtrack | Kingdom Hearts Original Soundtrack Complete | Kingdom Hearts Birth by Sleep & 358/2 Days Original Soundtrack | Kingdom Hearts: Dream Drop Distance Original Soundtrack