I am having trouble figuring out this one dragon cartoon I watched in the 80's or 90's. It may be older than that. I have no idea.
The parts I remember is there are one or two kids on some kind of quest, with a dragon helping to guide them. I really only remember two scenes. One is in some kind of magical cave where a voice is talking to them and there are either mirrors in the cave or some kind of glasslike appearance where random things are appearing...
Then I also remember at some point they needed to get to another side of something but there was no way to pass; there was a huge drop between two cliffs, so the dragon stretched himself across both cliffs so the children could climb across his back.
There is something also at the end with some kind of evil looking castle...
I have no idea what movie or short film this was and it's driving me crazy!
