I accidentally found the sprite sheet that was on "Photobucket" while cleaning out my inbox. You can see the sprite sheet here: img823.imageshack.us/img823/21…
Turns out the sprite sheet had been hosted on Imageshack, not Photobucket. Plus, I still lack the information on who ripped the sprites or even what game they came from. I thought they came from Sonic Advance 2, but apparently it is unclear which Sonic Advance game they came from, considering that the title of the sprite sheet got truncated.
This isn't really useable as a Group icon because of the file size. It can still be used as a Stamp, however.
If you do use it, give credit to me, Midday-Mew!
Master Emerald Altar sprites and background were ripped from Sonic Advance 3 by MJaller of MysticalForestZone and/or The Spriter's Resouce.
Original Chaos Emerald Sprites belong to Sega and Sonic Team, and were ripped by whoever ripped them (I don't know who, that information has been unfortunately lost).
Rest of Chaos Emerald sprites were scratch-sprited by me, Midday-Mew!
Chaos Emeralds, Sonic, Sonic Advance 2, Sonic Advance 3, Master Emerald, Altar, and background belong to Sega and Sonic Team.
The border of the animation was edited from the deviantArt default Gr
oup icon and therefore the border belongs to deviantArt.
Animated by me, Midday-Mew!