|This needs a stretch.|
|A haunting need for images|
The van is incredibly similar to the Mystery Machine in terms of size and shape. It is purple with 'Enigma Engine' in green lettering on the side.
Presumably added after the original Mystery Incorporated owned it, a large missile could be ejected from the van. (The Horrible Herd)
It sat underground while Professor Pericles was awaiting the excavation of the Evil Entity's seal.