The Anti Black Coat is a Nightmare Dream Eater that appears in Kingdom Hearts 3D: Dream Drop Distance. It is a physical manifestation of the nightmare that Sora experiences while trapped in sleep.
As Riku tries to wake Sora from his deep sleep, the Anti Black Coat appears. Riku accuses the Anti Black Coat of causing Sora's nightmare, and they engage in battle. Riku emerges victorious and the Anti Black Coat vanishes.
As its name implies, the Anti Black Coat wears a garment of the same name. Its hood is up, showing none of its face save for its disk-shaped red eyes - matching the description of Vanitas prior to Ventus's connection with Sora - signature of a Nightmare Dream Eater. The Coat has magenta flame designs printed on the sleeves and around the bottom coattails, similar to Vanitas's bodysuit. Prior to its fight with Riku, the Nightmare emblem appears on its back, mirroring the Spirit emblem on the back of Riku's outfit.