Agent D (dog)

Agent D is a dog, his first name is unknown, not much is shown of him but he was seen in the Traffic Cam Caper episode. Agent D also appears in It's About Time! as the audience member on Dr. Feelbetter. In Day of the Living Gelatin, it is revealed that he stands next to Agent R. Agent D bears a resemblence to The Mighty B! character Happy Walter Higgenbottom.