Probably Sonic 4 episode 2
If your talking about the original Sonic the Hedgehog, then Sonic and the Secret Rings is way better.
Modern Sonic and Classic Sonic, and somehow the characters swap like in Green Hill Zone, instead of Modern Sonic, there's Modern Tails!
No.
Mario & Sonic at the Olympic Games, Mario & Sonic at the Olympic Winter Games, and Mario & Sonic at the London 2012 Olympic Games do not have unlockable characters. All playable characters are available from the start.
The multiplayer characters in sonic the hedgehog next generation are: Sonic the Hedgehog Sliver the Hedgehog Shadow the Hedgehog And that's it, nobody else.
There are many factors on who should change or not, if they are a main character (knuckles,shadow,sonic,tails) then in order to keep modern, their voices will change more than the minor characters/one time apperance characters (vanilla,metal sonic,mighty).
Anything that's not in the Sonic Games, Comics, and Cartoons.
No.
Probably Sonic 4 episode 2
New Mario characters: Donkey Kong, Bowser Jr. New Sonic characters: Metal Sonic, Silver
Sonic and Blaze
just sonic.
Sonic the Hedgehog 4: Episode 2.
In Sonic Heroes for the PS2 and I think Sonic The Next Generation or something.
no
If your talking about the original Sonic the Hedgehog, then Sonic and the Secret Rings is way better.