The Blanket is an item in Paper Mario: The Thousand-Year Door.
While Mario is aboard the Excess Express, he discovers that the conductor is a Blanket short. Mario searches for suspicions in the whole train. In Cabin 004, he uses Vivian's Veil to go underground. Ghost T. appears after a few seconds. He asks Mario to find his long-lost diary in the baggage room. Mario returns it, receives the Blanket, and returns the Blanket to the conductor.