Flint Hammerhead is a Sanrio character from the television series Flint the Time Detective. Flint is a young, strong caveboy who was fossilized by Petra Fina with his father upon discovery of Getalong. He was freed by Dr. Bernard Goodman's technology and became a member of the Time Police. His weakness is when his stomach runs on empty, apparently the same weakness taken from Son Goku (Dragon Ball) in Dragon Ball (anime).