1. Sonic Adventure 2 evolved a lot, originally neither Rouge, Shadow or Tails were playable but the fans demanded tails to be playable so they basically gave him the controls and gameplay of Dr.Eggman, but there is also a theory thats says that tails was going to be playable using his chao garden controls(in the chao garden Tails can fly, drown and attack) but they ran out of time.
Shadow was named Terios, Rouge was named Nails and the story was going to have a morality system that was later used in Shadow the Hedgehog.
2. Knuckles Chaotix has some mystery inside of it, a build was found some time ago called "Sonic Crackers" that is basically an early version of Knuckles Chaotix with Sonic and Tails, both a new super sonic sprite and a tails with the tornado sprite were also founded.
3. Sonic Adventure originally used the classic sonic model from Sonic R/ Sonic Jam as depicted by this image, this image is from a early trailer of the Sky Chase, there is also information that says that originally Sonic Team wanted to make a 3D Sonic RPG but then it shapeshifted into Sonic Adventure.
4. Sonic Mega Collection and Sonic Gems Collection both were originally going to have Knuckles Chaotix in them but couldnt due to emulation problems.
5.Sonic Heroes"s Team Dark third member was originally E-102 Gamma but since Sonic Team couldnt find a way of bringing him back without being too ridicioulous they instead created E-123 Omega.
Well Guys, Sonic Month is over and Dead-Pool is back!, what will happen on february? only time will tell...
Well Guys, Sonic Month is over and Dead-Pool is back!, what will happen on february? only time will tell...