- For other uses of "Crystal", see Crystal (disambiguation).
| Crystal Nerdlinger
Crystal Nerdlinger was an acquaintance of Shaggy Rogers.
Scooby-Doo, Where Are You!
Shaggy misunderstood Velma Dinkley when she found a book on crystalomacy, and in response, said that he had never heard of a Crystal O'Macy, but had known a Crystal Nerdlinger.