Okay, I'm trying to find the name of a movie I watched as a child, I actually rented it from the library.. it had puppets in it, but it wasn't a Jim Henson movie/ Muppets. They sang, like for one of the songs I remember they sang "Old time rock and roll" and I remember something to do with the moon, one of the puppets got mad and stole the moon or something and it became really dark... If anyone could help me remember the title that would be great, I'm about to go insane!

It would help to know what the "puppets" looked like. Were they representations
Of people, animals, or something else?

The dark crystal

I think I'm trying to find the same movie. Wasn't it the sun that was stolen, so darkness fell over the land? I think there was a talking train too.

Sounds like the OP is describing The Land of Pleasant Dreams: The Boy Who Wanted the Moon, not sure if it's what you're looking for though.