Released in 2001, this short run of Rocket Power Rev-Up Figures by Mattel were based on the x-treme kids animated show. Rocket Power Figures suggested retail price was $2.99 (according to a KB Toys sticker found recently on some items). One boxed playset was made of a skate park.
It appears that Rocket Power and Jimmy Neutron were the final 2 lines under the licensing agreement with Mattel and Viacom's Nickelodeon. One must wonder if the line was cancelled after initial shipments, as it wouldn't make any sense to release only a couple characters from the show.