The Scooby-Doo imposter is a white dog painted brown. He is a member of the gang of Mystery Inc. impostors.
He looks very much like Scooby-Doo, but his black spots are in different places.
He is a trained attack dog and has no problem charging "monsters" on command from his master, the Fred Jones impostor. He cannot speak.
Scooby-Doo! (DC Comics)
Insert details here. (Double Trouble)