Unfortunatly it's not Heavy Metal (looks like a cool movie though). Now that i think about it i think the one stretchy guy was really skinny and had a big nose (his entire body could stretch, i think there's a scene how they get out of a cage or something because he can slide through it). Then there was another character that was a round ball maybe. It was a kid's movie, i was only 7 or 8 at the time.