The Devil (デビル, Devil) (called Demon on the British version of the Smash Bros. DOJO!!) is the villain in the NES game Devil World, developed by Shigeru Miyamoto, which was released for the Japanese Famicom and PAL NES systems only.
The Devil acts as the villain and main hazard in Devil World, where he tries to thwart the efforts of the heroic dragon Tamagon to destroy him and seal Devil World away for eternity. He appears in every non-bonus level at the top of the screen, pointing in various directions in order to make the walls of the current game area shift around the level, thus limiting the player's movement to a small window of the full maze. When a stage is cleared, the Devil recoils, turns into a bat and flies away.
The Devil was mentioned in the description of the Tamagon trophy as "a large, winged demon". This trophy was only available legitimately in the Japanese version of Melee.
As an assist trophy
When released, the Devil appears as a bat, flies to the top of the screen and turns into his humanoid form. He then starts pointing in various directions, accompanied by an 8-bit sound from his source game: this causes the screen to scroll in the opposite direction, effectively altering the offscreen boundaries of the stage. The effect is great enough that it can leave just a small section of a stage, e.g. Battlefield, remaining. When playing in Pirate Ship, it is also possible for the entire stage to be moved offscreen. This also allows for more camera control freedom when the game is paused. After a short while, the Devil disappears in a puff of smoke and the screen turns back to normal.
The NTSC version of Brawl lists the game as 'Japan Only' in error. The PAL version corrects this.
As an Assist Trophy
The Devil returns from Brawl, his function completely unchanged, allowing the player to see beyond the camera boundaries of many new stages.
As an Assist Trophy
The Devil returns as an Assist Trophy. Training Mode describes his Assist Trophy with the following: Moves the stage in whichever direction he points. Can't be KO'd.