
"The Money," in my opinion, is the greatest single episode that Gumball has ever created. Its examination of the Wattersons' financial situation, how it manages to strongly demonstrate the role that each Watterson plays in the family dynamic, and how it shatters the fourth wall so dramatically makes it, no matter what angle you look at it from, a complete blast. With that being said, though, I don't think it really warranted a sequel, but alas, that's sort of what "The Ad" is.
I'm not saying that "The Ad" traces the plot of "The Money" very much, though in all honesty, it's not a bad episode to take notes from. Rather, it follows the same basic plot of Richard wasting money on something particularly lavish—in this case, a horse named Wunderklopp—causing the family to take every measure possible to scrape up the money to survive for a month until a potential horse buyer can pay the money back. While "The Money" devotes itself to exploring their depravity and falling dignity, though, "The Ad" simply finds them involved in a scheme, using their house as a bed and breakfast to earn money, all while secretly living in the house. Theoretically, the premise offers up promising absurdity, but the route the show takes somehow winds up crafting one of the most boring, uneventful episodes since Season 5's "The Deal."