The X Factor.
The X-Men cartoon was first aired October 31, 1992. It is also known as X-Men: The Animated Series. The show aired on the Fox network in the US for 5 seasons, a total of 76 episodes.
X-Men
Sonic X..
sometimes she is she only comes in very rarely
Xavier, Charles - X-Men cartoon series
No there was a roomer that a 4th season of Sonic x was going to show on Toonami but it was obviously a joke since Toonami was canceled years ago.
There is currently a live-action X-men show in the talks with Fox and Marvel. I assume they hope to go the way of Gotham and The Flash.
X-Men
There is not yet a cartoon after Sonic X. However, there is a cartoon being worked on called Sonic Boom(working title) that will air on Cartoon Network in the fall of 2014.
X-men
X-Men and related shows?