What episode does season 4 of Star Wars the clone wars end?
The last episode of Season 4 is named "Revenge."
In star wars clone wars season 2 episode 15 onaconda farr dies and how come in star wars clone wars season 3 episode 11 onaconda farr is alive is this lucases mistake?
No it is not a mistake. If you look at the episode guides for season 3 on the main Star Wars website, it reveals that in timeline order, the episodes are mixed around. One episode revealed that in timeline order, the season 2 finale takes place before season 1 finale. So, according to the website, as of now, Season 2 Episode 15 is the last episode in timeline order