Make Your Own Barney Rubble Costume Using These Steps. Barney Rubble, better known as Bernard Matthew Rubble, is one of the show's most popular characters. Fred Flintstone's best friend and next-door neighbor. Betty Rubble, his wife, and their adoptive kid Bamm-Bamm live together. Barney is a friendly and outgoing individual who enjoys making new acquaintances. Like Barney, he's pleased with his existence and isn't pursuing riches like his closest friend, but he's always prepared to lend a hand. This is a how-to tutorial for dressing up as Barney Rubble. Cosplay Ideas for Barney Rubble from The Flintstones Throughout the run of the cartoon series, Barney Rubble has donned a variety of clothes. Some of his costumes are just variations of his normal attire. However, he, like the rest of the cast, is best known for his everyday attire. Barney Rubble wears a lot of the same stuff in The Flintstones as he does in this costume. There are two black threads that form a cros...