Philo Quartz is a character made exclusively for Hanna-Barbera's The Flintstone Kids, a stand-alone prequel spin-off of The Flintstone created in the wake of the success of Jim Henson's Muppet Babies. He is one of Fred Flintstone's friends and an aspiring young detective whose father works for the Bedrock Police Department.
While The Flintstone Kids never had a Christmas episode itself, an adult version of Philo appeared for the first and only time in the syndicated Christmas telefilm A Flintstones' Christmas Carol, where it's implied that he decided to follow his dad's footsteps and became a street cop. He is cast as The Ghost of Christmas Yet to Come in the Bedrock Community Theater's production of A Christmas Carol, but after he gets the Bedrock Bug offstage, Dino fills in for him.