X-Men, the 94-97 series, is a cartoon based on the Marvel comic works of Stan "The Man" Lee. It is based on individuals known as mutants, who have special powers, who live all over the world, and how society treats those who are different to the "norm".
More specifically, it follows a certain group of mutants, known as the X-Men, who have been taught to harness their powers, and who attempt bring harmony between mutants and non-mutants throughout the world.
It was a quality show, up until the 64th or 65th episode where manga, or some other similar type of cartoon drawers, replaced the original artists, changed the clothing, and changed, essentially the direction of the show. Some of the actors were replaced here too. Needless to say, once this turn was made, the show lasted not even another ten episodes.