Terror is a fan made antonigist in Abandoned Discovery Island and a unoffical antonigist in Five Nights at Treasure Island: Nightmare Before Disney.
He looks like the normal Terror from Nightmare Before Disney. Also he is a Mickey suit but he has no pupil in his left eye and a human eye in his right eye. He is missing half of his left arm and his right leg is broken.
He starts in Character Prep 2 laying down behind under the table. Then he stands up and moves to the Bathrooms. Then he goes to the Janitor's Closet. Then he goes to the Meat Freezer and then the office. You must shut off the power.
He is actually a scrapped character on V3 in Nightmare Before Disney.
His jumpscare is going to be a killscreen as mentioned in Terror's Character Information in NBD V3 because it says that his jumpscare was going to crash the game.