Board Thread:Episodic and Issue Discussion/@comment-1038387-20130220195140/@comment-4928331-20130221115637

Superboy hates monkeys.

And as for Monkey, he could be dead, as the normal lifespan for a green monkey is roughly around ten years. He could already be an old monkey by Team Year zero.

Alternatively, the Department of Homeland Security disallowed the importation of wildlife into the United States as a personal pet, and he was donated to some zoo somewhere.