Haha! It's funny because it's true!
You did a great job making fun of the X-Men, it's been ages since I had a laugh as good as the one(s) I got from watching this. I've seen just about every episode of the X-Men on TV (so I got most of the jokes), but sadly I've never read the comics (and I assume most of the jokes were from there). I don't recall any of the X-Men dying countless times in the series, but I guess the comics covered more story than the episodes did (which is why I don't know who Shadowcat is).
You did a great job with the voices (especially Magneto, Beast and Wolverine's voices), and the jokes were placed ingeniously. I'm going to see the next part now, great job. :)