I have Sonic Shuffle for my Dreamcast... Thing is i can't find it anywhere in my **** house. I've actually only been a Sonic Fan since 2001 or 2002, when i got SA2:B & Sonic Mega Collection for christmas. I didn't get a dreamcast until a few years after. (Ordered it Online) Along with the 3 Sonic games on the system. (SA1, SA2, and Sonic Shuffle) I got SA1 & SA2 just to see the difference between them and SADX & SA2 Battle.
Note: Back in 01 or 02, i didn't know Sonic was ever a rival to Mario. I learned that later, just don't flame me for not knowing. (I'm only 14 years old!) Sonic's 1st game was made before i was even born.
EDIT: @GotBlood I had a Wii since Jan. 2007
The differences?
SA/SADX: Sonic Adventure DX appeared to have cut the speed of the game by a small fraction of sorts. Also, DX has a bunch of Game Gear games available. It also has better character models and junk.
SA2/SA2B: Slightly improved graphics, more stuff to do with Chao, More unlockables, and better 2-Player mode.
Sonic Shuffle never had a remake, so yea..
However, its interesting to note that Sonic Adventure 2 (not sure about 1) had an online mode where you can download a new racetrack for kartracing, online Chao races, and downloadable content.
About the Wii thing: I should be getting one in November...
I was born in '89. Started playing Sonic in '94. I've been around since Sonic, but I had to play "catch up" with his Genesis/Saturn/Game Gear games.