Question: How did Stone see Robotnik's message at the end? It appeared to be displayed on jumbotron-like devices in big city squares, but Stone was in London and there didn't appear to be any giant screens, or even small ones, anywhere near him.
Question: SPOILERS: When Sonic and Shadow land on the moon, they have a heart-to-heart conversation and appear to be breathing. But there's no air on the moon. Are we to assume that the Chaos Emeralds (which have given them both powers) are giving them the ability to breathe and speak in the environment?
Answer: Hey, it's a video game movie. Logic may not necessarily apply here.
Rob245
This isn't a valid answer. Logic doesn't have to apply; the question is, what in-movie or in-game reason is there? If there's no explanation given, that would be a valid answer. Pointing out the obvious is pedantic at best.
Bishop73