Bert is a purple Cameo-character that only appears in "Porous Pockets". He is friends with Harold and he usually lends money from him. He calls Harold, "Bill" for unknown reasons. However, he was only called Harold in a television advertisement and Bill may be his real name. He is seen in SpongeBob 's short-lived mansion. He is lavender, with Sunglasses and a goatee, he also wears a Yellow shirt as a pedestrian.