I became sad and disappointed when I saw "Wild Parts" and "The Problem with Billy". Not that the storyline in "Wild Parts" was bad, it was actually interesting, but honestly what ruined that episode was the running joke about picking nose, which was annoying and repititive.
But in "The Problem with Billy", please, it was a waste of time and money for the creators. The story was incredibly stupid, it was like they just wrote it for fill the series, and the farting jokes were also annoying and repititive. More, the baby forms of Billy, Mandy and Irwin are really ugly, they should be cuter in my opinion. The only enjoybale thing in "The Problem" was Grim's final thought: