One year before Scooby-Doo began chasing fake monsters & ghosts, Archie encounters a "Groovie Ghost" in this episode uploaded by Joramma20. Actually, the "ghost" is Reggie (John Erwin), who channels Maynard G. Krebs (Dobie Gillis) by being lazy and not doing any work on a proposed clubhouse---and likely recording studio---for the gang. He'd rather play his pranks than do something constructive, until Archie (Dallas McKennon) turns the tables.......!
Followed by a demonstration of "The Weatherbee", which we've seen before.....
The plot's been used a few times before, so the ending was, in fact, predictable.