Flint, the Time Detective, was another Japanese anime imported to the US by Fox, making his American debut in 2000, airing on both Fox & Fox (now ABC) Family, two years after the series launched in its native Japan.
Flint is from prehistoric times, resurrected from a fossil, and given a job as a time detective, traveling across the boundaries of time & space, with two contemporary companions. However, he really wasn't a brain surgeon after all, as his assistants did all the work for him. His club was actually a sentient rock housing the consciousness of his father. Yeah, try figuring that one out.
Here's the American intro:
As bad as it seems. Rating: C.