The best episode written by Richard Steven Horvitz is "Keeper of the Reaper", rated 8.5/10 from 2 user votes. It was "directed by Juli Murphy". "Keeper of the Reaper" aired on 1/13/2006 and is rated 1.5 point(s) higher than their second highest rated, "The Bad News Ghouls".
When Billy's dad gets a promotion at his job, he tells his family they are going to move to another town, starting a dispute between Billy and Mandy over who gets custody of Grim. Grim suggests they settle this in court, and hours later Billy, Mandy and Grim find themselves in the Underworld court, presided by Judge Roy Spleen, and which has Fred Fredburger, an incorrigible dumb character, as a juror.
Director: Juli Murphy
Writer: Richard Steven Horvitz
After Billy's baseball team loses badly against Mindy's, Grim decides to coach them. Mandy is not allowed on the team, as Billy is reluctant to let girls play, although he does not realize Mindy is a girl too. Mandy puts on a baseball cap and, assuming the role of "Manfred", pitches for Billy's team anyway. With additional help from ghoulish players which played in the Underworld Little Leagues alongside Grim, Billy's team wins when Pud'n hits a home run.
Director: Brian Sheesley
Writer: Richard Steven Horvitz