Mr. Peanutbutter

Mr. Peanutbutter is an energetic and cheerful yellow Labrador Retriever who is BoJack's former sitcom rival and Diane's ex-husband. Mr. Peanutbutter was the star of Mr. Peanutbutter's House, which, according to BoJack, "borrowed the premise" from Horsin' Around. It is revealed in the episode "See Mr. Peanutbutter Run" that the working title for Mr. Peanutbutter's House was Untitled Horsin' Around Knockoff. Mr. Peanutbutter portrays many characteristics of an actual Labrador, including a love for tennis balls, a hatred of the mail man, and suspicion of doorbells and is sweet, loyal, kind, playful, and considerate.[3]

Mr. Peanutbutter grew up in the Labrador Peninsula, which is depicted as being populated entirely by Labrador Retrievers. "Mr." is his actual first name; he has an older brother named Captain. Mr. Peanutbutter often shouts to an off-screen, but implicatively outlandish presence only known as "Erica". He is a graduate of Northwestern University.

Despite their rivalry, Mr. Peanutbutter cares a great deal about BoJack's opinion and admires him for his work on Horsin' Around. He has an especially good relationship with Todd, and his positive attitude and financial resources, combined with Todd's outlandish schemes and plans, often result in the two starting questionable business ventures, such as a Halloween store that is open exclusively in January. He also had a stint at filming a celebrity reality show called Peanutbutter and Jelly.

In the episode "Let's Find Out", Mr. Peanutbutter starts hosting his own televised game show, Hollywoo Stars and Celebrities: What Do They Know? Do They Know Things? Let's Find Out!, after his film company enters bankruptcy due to his and Todd's extensive expenditures on useless products.[4]

In "Hank After Dark", it is revealed that Mr. Peanutbutter was formerly married to a woman named Katrina who was emotionally abusive. His second wife was actress Jessica Biel, who is portrayed as being obsessed with her celebrity status and people recognizing her. In season one, he marries Diane Nguyen, his third wife.[5]

After his divorce with Diane, he dated a pug named Pickles, who is much younger than him but shares a lot of the same characteristics. At the end of the season 5 finale, he proposes to her, though only out of guilt after cheating on her with Diane. In season 6, he reveals his infidelity to Pickles, leading her to sleep with several men in an effort to get back at him. Later on in the season, although Pickles leaves Mr. Peanutbutter for singer Joey Pogo, he becomes content with his circumstances.

• List of BoJack Horseman characters
• List of fictional dogs in animation