After Sam Register (the creator) pitched the idea of Hi Hi Puffy AmiYumi having their own cartoon series on Cartoon Network, the animation studio Renegade Animation created a pitch pilot, in the hopes of swaying Cartoon Network to green-light the show's production.
The pilot was sent to Cartoon Network and they accepted it and it was to air in late 2003, but for unknown reasons, the pilot was reworked and later premiered on November 19th, 2004. The series premiere was successful and was even at the time one of the highest-rated shows to premiere on Cartoon Network.
