in the episode 'romancing the clone'
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)
What clone? Fives, Rex, Echo and Cody are in it and as far as i know the other clone names are unown
Yes, they can. Even though all clone troopers have the same face, they all have different personalities and skills. There was one episode in the Clone Wars show called "The Deserter." In that episode, Rex found a deserter clone who was married and had 2 kids.
Echo did not die in clone wars he showed up in season seven
Season 1, Episode 10.
This was the first movie of the Clone Wars. It is called, "Star Wars: The Clone Wars"
He isn't mentioned, no.
No, he is alive in episode 3, so he must live through the clone wars.
First Episode then then the clone wars is in between the Second & Third Episodes.
Episode 93, "The Mysterious Pervert Monk Who Comes and Goes"
If you mean Slick, the clone traitor in Star Wars: The Clone Wars, he is in Season 1 Episode 16 "The Hidden Enemy." And he was indirectly mentioned by Ahsoka Tano in Season 2 Episode 8 "Brain Invaders"