History of character is unknown.
- Immortality: As a resident of the Dreaming, Merv Pumpkinhead is effectively immortal. So long as sentient life capable of dreaming exists in known reality, Merv will continue to live. However, this is not to say that Merv cannot be killed. Like many from the Dreaming, Merv is vulnerable to mystic attack and his corporeal form can be destroyed.
- Merv Pumpkinhead is a pastiche of Jack Pumpkinhead, a character created by novelist L. Frank Baum and featured in his Oz series of novels.
- 35 Appearances of Mervyn Pumpkinhead (New Earth)
- 2 Images featuring Mervyn Pumpkinhead (New Earth)
- Quotations by or about Mervyn Pumpkinhead (New Earth)
- Character Gallery: Mervyn Pumpkinhead (New Earth)
- Merv Pumpkinhead at dccomics.com
- Merv Pumpkinhead at Wikipedia.org
- Wikipedia:Mervyn Pumpkinhead article at Wikipedia
- Mervyn Pumpkinhead profile at the Unofficial Guide to the DC Universe