Captain Cake is the Arch Enemy of Sector Z Mark 2. He is dressed in a Sailor Uniform. He first made himself known to the sector on their Cake Day, which was the day when they were given cake from The Moonbase. The cake was sent to Numbuh 1Billion, and he took them to their Treehouse (which is actually not where the original treehouse was, it would interfere, It's actually in Numbuh 1Billion's backyard). But, on the way there, he zapped the cake with his Fruit-cakeisor, turning the delicous Chocolate cake into a healthy cake with FRUIT in it!