(Source - Wiki)
Plot Summary: it is the 25th century. The dark lord has 'infected' history with time-devices that could damage history beyond repair. Flint and his father lived in the prehistorics when they got turned into fossiles. They are discovered and Flint ges turned back to his original state. With the help of his father, a boy Tony and a girl Sara he has to travel trough time to bring the time-devices back to the land of time so history will be saved.
Genres: action, adventure, comedy, fantasy, mystery, science fiction
(Source - ANN)
The show is centred around the adventures of Flint Hammerhead, the "Time Detective", a boy from the prehistoric era who was resurrected from a fossil and became a Time Detective, although his competency as a detective is dubious. Much like Inspector Gadget, much of the heavy thinking is done by Flint's accomplices, Sarah and Tony Goodman who accompany him on his adventures. Flint, however, pulled his weight in battle, when he would fight with the aid of his father Rocky Hammerhead, who had also been partially resurrected from a fossil (however, his resurrection was not completely successful, leaving him as a sentient rock with a face; all he could do was talk. He was fashioned into a hammer for Flint, who, in addition to being a sturdy weapon, could give him sage advice in and out of combat.) Flint's job as a Time Detective was to go back in time and convince a race of time-shifters to ally with him to protect the timeline. Usually he fought against Petra Fina and her cronies Dino and Mite (very reminiscent of Marjo, Grocky, and Walther from Time Bokan) who were in employed by a masked being called the Dark Lord to retrieve the time-shifters for his own purposes - invade the Land of Time (where he scattered the Time Shifters from). The creatures were similar to Pokemon or Digimon in that, in addition to their collectivity, they originate as small, cute creatures, who can evolve into much stronger forms (usually they had two evolutions, an evil one induced by Dark Lord's magic in the form of the Petra Stamp/Uglinator, and a good one later induced by Flint and company) before reverting back again.
The above is a summary from Wikipedia concerning the horrid english dubbing of the series which was directed towards children, sadly. Consisted of 43 episodes total (while the english adaption only had 39) and was directed by Hiroshi Fukutomi (who also directed Whistle!).
Anyway, this was a pretty good series. Rather amusing, but the Japanese original is better than the Saban Entertainment dubbing. Of course.