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)
The Heartbroke Kid.
The name of the episode is Barting Over. It aired on February 16 2003 and is the 300th episode of the show.
The 15th episode of the 18th season: 'Rome-old and Juli-eh'.
The name of the episode was "The Haw-Hawed Couple"
Pranksta rap
Bart of Darkness
The three part episode 'Tales From the Public Domain' (episode 14, season 13). Bart plays Hamlet in the section titled 'Do the Bard, Man'.
loser you are
'Marge's Son Poisoning' (episode 5, season 17).
Bart of Darkness. It's in Season 6.
The episode is Bart Carny and they meet Cooder and Spud at the carnival.
It's The Simpsons 300 th episode - "Barting Over". Season 14, episode 11.