Quark is an extra-dimensional agent of Mojo.
Being one of Longshot's competitors, he had a grudge against the star for some time. When Mojo traveled to Earth's dimension, Quark acted as one of his bodyguards. He later attacked Longshot, wanting to forever be known as "the man who defeated Longshot". Longshot made short work of him.
Currently the only version of the character outside the comics.