Coffin

The Coffin is a cardboard box with 'COFFIN' written on it in black marker which was used by the Pallbearer to carry Scooby to his grave. After it's journey was complete, however, the Coffin was tossed aside and forgotten - Scooby was burried without it in the soil. And so ended it's one scene-long journey.

Behind the Scenes
The Coffin is an object beloved by the cast and crew behind Operation S.C.R.A.P.P.Y and which served multiple purposes. For example, it was also the box used for Scene 2 of the film, when Scooby is supposed to be underground and get pulled down to the Hell by the skeletal hand of Death. It was also used as Cell 44 in Scene 3 of Operation S.C.R.A.P.P.Y. With the exception of Scooby himself, the Coffin is quite possibly the most useful prop ever posessed by Critical Productions.

The Coffin even made a brief cameo appearance in the cancelled Operation R.E.L.P Video Game. In the player's cell, there is a pile of debris. If the player examines the debris, they will find a small, cardboard box that's burried under the rubble, and the message "There's a cardboard box underneath the rubble...The word 'COFFIN' is written on it in black pen."