sheiny

1) Rouge's Treasure Scope:
Go to Security Hall and get to the Yellow Floor, then head over to the end that's the closest to where you started the Stage and you should see a Shrine. Play the Mystic Melody and a line of platforms will appear, get across them and then continue along to find the Treasure Scope.

2) Eggman's Mystic Melody:
From the very beginning of Sand Ocean, go onto the little spinning platform, but make sure to stay on one of the long thing's edges. When the long thing you're on gets to the very left, jump up really high and start Hovering towards your left. I know that the camera angle sucks, but that's for it to be hidden from normal view. Anyway, a second after you make your way there, you'll see where you're going, because the camera will move to show you. There's going to be a platform ahead, so try to land there. It shouldn't be hard at all, though. Once you land there, just make a few hops, up to the Mystic Melody.

3) Sonic's Mystic Melody:
It's found in Final Rush after the 5th Checkpoint - you'll come to a large room with many different paths; after the long vertical grind, grind down the next platform and then it'll split. Take the left rail and you'll come upon a platform with a rocket - take the rocket and you'll eventually come across the Upgrade.