The Clipboard Men are the administrators of Darwin's research in "The Genius." At the end of the episode, they return Darwin to the Wattersons after they realize that he isn't a genius after all. Gumball's Brain tells them that Rocky was the real genius and they leave with him instead. A clipboard man was also shown on TV in "The End," and in a police car in "The Curse."
They both are clipboards. Their arms, legs, and faces are designed in 8-bit fashion, suggesting that they are somehow technological. This is supported by their voices, which both sound computerized, similar to Bobert's voice.