Okay im new to this series and just saw a couple of episodes and i wonder what ever happened to Asoki, Can Bane and Captain Rex? Thanks for your answers

well noone really knows their fate they are all apperaing in season 3 of the clone wars which starts september 17 on cartoon network at 9pm (time maybe different i live in florida and its 9pm) sorry i don't quite understand your question if you have specific questions or wanna know more just ask me on here or message me and i will be happy to answer the best i can

Do you mean why do these characters not appear in Episode III: Revenge of the Sith? So far the fate's of the characters you named are unknown. There is much fan speculation around the web, especially surrounding Ahsoka Tano.

first of all witch episodes did you see if u dont tell i cant help u