He's the leader of all the other aliens and is particularly intelligent and dangerous. His goal is to take over the universe. He generally looks like a red humanoid octopoid, but he often evolves into various creatures (with the form of a bee, a horse or others).
As the main manifestation of the Genus' will, Scopes is a powerful threat. Every time he is destroyed by the team, the Genus recreates a new Scopes from scratch, the new one gaining the previous memories and experience from the last one. As such, he eventually gains a voice, rather than continuing to roar like an animal in his first appearances.