The Evil Box was a secret item found before the Garage and Laundry Room update. Before the update both rooms were there, just empty and inaccessible. Players were able to glitch through the wall (Using the same method to get in as the Room Of Great Achievement) And would spawn in the empty room. Nothing was in the room, except a small red box called "The Evil Box" sitting in the middle. It did nothing, and could not be opened. The box had weird physics, and could send an object flying when touched. It's a plain red box.