no its fake
No such episode called "Dead Bart" exists.
Bart sells his soul in the aptly titled Season Seven episode, Bart Sells His Soul
It's a claimed lost episode from The Simpsons, however, it's been proven it's fiction. It's about Bart getting sucked out of an airplane and dying, hence the name.
In the "Treehouse Of Horror" episode.
Episode 5
In no episode does Bart get a clone however he does get a double in the form of Simon Worsterfield when they switch places in the episode Double, Double, Boy in Trouble (Season 20 Episode 03)
There are no "authors" when it comes to Bart Simpson. The writers give Bart purpose in whatever the episode's plot is about.
Bart the General is fifth episode of The Simpsons.
Episode 3, Season 20.
O Brother, Where Bart Thou
Bart Simpson played on the hockey team called the "Hockey Dads" in the "The Simpsons" episode titled "Bart the Daredevil." The team is featured in a subplot where Bart, along with his friends, participates in ice hockey. The episode showcases Bart's antics and his relationship with his father, Homer.
The three part episode 'Tales From the Public Domain' (episode 14, season 13). Bart plays Hamlet in the section titled 'Do the Bard, Man'.