There was an animated movie about Sky pirates and the people who fought them. But then they needed to work together. It was about a kid who joins and he has monologues throughout the movie. It was early-mid 2000.

Three suggestions:
Aero-Troopers (http://www.dvdtalk.com/reviews/9646/aero-troopers/)
Treasure Planet (http://www.imdb.com/title/tt0133240/reference)
Castle in the Sky (http://en.wikipedia.org/wiki/Castle_in_the_Sky)

I agree with castle in the sky