Today WhenItWasCool.com takes a look back at the classic 1990s X-Men the animated series cartoon. This cartoon aired during the peak of the X-Men's pop culture hype. The comic books were selling gangbusters and the cartoon series aired to both commercial and critical sucess. Let's take a look back at Wolverine, Cyclops, Professor X, Jean Gray, and the whole X-Men gang in this iconic cartoon series.