Children's fads' shelf lives are often the equivalent of a teenager's attention span. Some, however, ignore the "flash-in-the-pan" trend and linger on for years, manifesting themselves on Underoos, stationery, and piñatas. Though it's been 13 years since the Power Rangers made their splash into the psyche of impressionable youths, the brand is still rolling on. THQ, which attained the rights to make games based on the series in 2000, today announced that Power Rangers: S.P.D. (Space Patrol Delta) has shipped to stores for the Game Boy Advance. In the game, players will assume the role of all five Power Rangers as they protect Earth from the evil Emperor Gruumm and his legion of robots. This is the sixth Power Rangers game from THQ.