Other mistake: In the any level, whenever Shadow switches to a rail to grind to, if recorded and watched frame by frame, his legs stick out of his body a bit and therefore revealing that the model's animations must have been rushed.
Other mistake: Select Charmy or yourself as the mission objective. When you get to a certain check point where you must steal an air saucer, Black Doom will say 'Use this device to teleport backwards' even if you do not have him as your mission character.
Other mistake: In a cutscene, Sonic says "we're on our way to the Ark, so I guess that means we're going too!" This phrase obviously doesn't make any sense and is supposed to be "they're on their way to the Ark, so I guess that means we're going too!"
Answer: Perhaps due to the comical nature of the game, and that the violence wasn't too bad, the rating board overlooked it.
Dra9onBorn117