If the Japanese one works what's the point of trying to use the American one? Also sonic cd runs very slow depending if you have an o3ds or a n3ds
I know, but the us version has a feature where if you pause the game and press any button you can restart the level.
I love this feature because when your stuck when you failed to time travel, you can retry the stage!
But the japanese version doesn't have that. I dont want to kill myself everytime i fail!