The Energon Pub

Ok, so there was an episode or movie or something where the transformers are on another planet (I think) where there are other transformers that just turn into big rocks that roll around.
Could anyone point to a specific episode where this occurs? Sorry about the lack of details but it's been probably 10 years since I've seen it.

Nevermind, I found what I was looking for. It's actually a gobots movie I was thinking of.