History
Nothing is known about Sylvester Stallion except he an anthropomorphic horse and is the Earth-8311 version of Sylvester Stallone.[1]
Trivia
This character first appeared in a collective, non-narrative pin-up image in Spider-Ham #14; the authorship of the image was not credited. The character has yet to appear in any narrative story.
The character is also a reference to actor Sylvester Stallone, in his role as Rocky Balboa.