: Hasn't got one
: Can't have one
: The Story of Doctor Dolittle
: There's only one
The pushmi-pullyu creature first appeared in a book, The Story of Doctor
Dolittle and was illustrated as an antilope with two heads
but in the 1967
film it was protraited as the two headed llama pictured above.
Other mythical creatures in my list are, Unicorns & Dragons.