Continuity mistake: During their fight at Autobot city, Megatron throws a rock at Optimus like a spear. Before he throws it it, looks big in his hands, but when it hits Optimus it looks quite smaller and fatter. Then Optimus pulls it out and it's back to the right size again.

Transformers: The Movie (1986)
Ending / spoiler
Directed by: Nelson Shin
Starring: Frank Welker, Eric Idle, Leonard Nimoy, Judd Nelson, Orson Welles, Michael Bell, Jack Angel, Norman Alden
More mistakes in Transformers: The Movie More quotes from Transformers: The Movie More trivia for Transformers: The Movie
Starscream: Oh, how it pains me to do this!
Megatron: Wait, I still function!
Starscream: Wanna bet?
Trivia: The creatures that judge Kranix, Hot Rod and Kup are later revealed in the next series of the Transformers cartoon to be the creators of all Transformers, and used to be the masters of them and Cybertron millions of years a go. They are called Quintessons.
More questions & answers from Transformers: The Movie
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Answer: The planet was called Lithone. According to a comic book adaptation, the race that dwelled there were an offshoot of the Transformers who were more emotional. The limited information given on the only two characters named in the movie, Arblus and Kranix, shows that they can transform even though this is never shown.