Almost all of the Sonic games have certain mysteries that can't be solved, based on pictures and other medias. Try and give any theories or even if you know what the mystery is, feel free to e-mail to me at clementchan@pd.jaring.my.
Compare the pictures and you'll
notice that a dragon is attacking the airplane during Sky Chase.
But, in the real game, the dragon did not even exist! So, why are
there dragon in both pictures? It might have been just a 'test'
by SonicTeam or it was really planned to come out, but they had
deleted that part in a hurry. But, thanks to GuywhtNfly@aol.com, this mystery is solved.
Here's what he said: "The pictures of the dragon were probably a Chaos 5 during Sky Chase. I remember going to a site before Sonic Adventure was released and it was called 'Chaos' the dragon. I guess Sonic Team ditched it because it didn't look watery like the other Chaos'."
Kilid@hotmail.com sent a theory based on this mystery, "I saw the dragon picture on a website too. I feel it makes sense that maybe you'd fight Chaos in the air because when Choas transforms, you fight in the pond and he's in the air. I think the order is, you fight in the pond, after you win, Robotnik throws the other emerald at Chaos and Chaos tranforms into the Dragon. Then the Dragon flys off with Tails saying "Sonic, we can't let him(Chaos) get away. Let's go to my workshop and we'll take the tornado..." Later on, when you're playing as Big you see Chaos again as the Dragon hanging in the air. That's my theory on that." Sounds logic, in my opinion.
The first picture is said to be
a part of Windy Valley but it really looks like Red Mountain.
Thanks again to GuywhtNfly@aol.com . "The first pic that looks like Red
Mountain is actually the background at the start of the Windy
Valley level with Sonic. Right after it tells you to destroy the
capsule, look to the right and you'll see it."
The last two pictures are about Tails. Both places look like
Windy Valley but that place are not in Sonic Adventure (in Tails'
Adventure)!
The most mysterious picture of all. Look carefully at the blurred
picture (it's shown at the commercial, that's the reason why the
picture is blurr). You'll see a Chao flying around with a Chao-mural
on the right side. If this is
really a Chao Garden, it would have been cool for such a big and
heavely place for Chao.
Yes, throughout the adventure
of Big the Cat, you will never ever come to this place. It looks
to me like Windy Valley but there is no water! Why would Big be
there? Look carefully and you'll see another thing. It looks like
a bridge to the Angel Island but the bridge in the released Sonic
Adventure is totally different! Strange.
Here's another mail I received from Kilid@hotmail.com. "In Sonic Adventure, during Sky Chase Act 1, you play the game and when you defeat it you see the camera turning around the plane. Look at Sonic! Strange, I recall him having longer spikes that hang down. He looks more like the Sonic from Sonic R."