Does anyone remember a cartoon with these three guys in spaceships, and they would get out of the spaceships and ride on top of them, they had like laser swords. It was a full length cartoon movie. I believe it was originally a japanese cartoon. Please help it has been driving me nuts, it was one of my favorite movies as a kid.

I think you referring to Starzinger (aka Spaceketeers aka Sci-Bots).

http://en.wikipedia.org/wiki/Starzinger