The Call of the Simpsons episode, along with his four other appearances on "The Simpsons", the best guest appearance in the show's history. "The Call of the Simpsons" received mixed reviews from critics. Warren Martyn and Adrian Wood, the authors of the book "I Can't Believe It's a Bigger and Better Updated Unofficial Simpsons Guide", both criticized and praised the episode saying: "This episode is a bit less than the sum of its parts. The early stuff at the RV Round-Up is much better than the main camping story, although there's some nice Marge-Lisa bonding, and who could resist Maggie and the bears?" In a
The Simpsons Bart Simpson. Who the hell are you?" and "Underachiever ('And proud of it, man!')". "The Simpsons" merchandise sold well and generated $2 billion in revenue during the first 14 months of sales. Because of his popularity, Bart was often the most promoted member of the Simpson family in advertisements for the show, even for episodes in which he was not involved in the main plot. Due to the show's success, over the summer of 1990 the Fox Network decided to switch "The Simpsons" time slot so that it would move from 8:00 p.m. ET on Sunday night to the same