Humphrey accompanied the Super Secret Pup Club and Niblet on their search for Napoleon. Thanks to Niblet's plan, Humphrey was able to get adopted by his perfect person, Katy Cooper. Humphrey is very kind. He complements Niblet when he shows them the peanut butter. When Niblet loses his faith, it is Humphrey who convinces Niblet to belive in himself. He is also seen with the Super Secret Pup Club a lot.