Does any body know the name of a movie from the mid 90s about a boy a spaceship and a crunch chocolate bar?

there's this movie from the mid 90s, prob from like 93-95. its about this boy who runs away from his house because he has issues with his dad. he runs into the woods falls, and hits his head. he wakes up and decides to go back home, when he goes back home he finds out he has been missing for like 10 years. for some reason he ends up hearing voices i think, and follows them to a airport hangar. he finds out the voices are from this robot creature that is inter graded into a silver type of space ship that shift shapes into different models. i am not too sure what he does with the space ship but i do know they somehow end up going to some gas station in the middle of no where and buy a crunch chocolate bar! i am not too sure how it ends but i do know that the boy ends up waking up from the woods and goes home too find out it was only a dream or something like that.