'Bart Wars' is not an episode of The Simpsons, it's a 112 minute DVD.
Bart the Genius
Bart the General is fifth episode of The Simpsons.
Bart's New Friend
O Brother, Where Bart Thou
Bart has to see a pychiatrist in the episode Yokel Chords- after telling a scary ghost story in the school cafeteria to get free food
Bart of Darkness
'Marge Gamer' (17th episode, 18th season).
Bart the Fink, from season 7.
A bullfrog (assuming you're talking about the Simpsons episode)
The episode of the simpsons entitled "I Married Marge" in season 3.
Season 11|Episode 02|Brother's Little Helper