You can in the multiplayer mode, but not in the main story.
Chat with our AI personalities
Its a hack or a cheat that lets you.
No,you cannot.The truth is,that Knuckles Chao never existed in the U.S.A version of Sonic Adventure 2 Battle.They only existed in Tokyo,Japan.BUT,the only way you can obtain a Knuckles Chao in SA2B is via hacking.
No there is not
Amy is already unlocked, just choose to play as her
It was revealed that in Sonic and The Black Knight that, Sonic was indeed on his way to his date with Amy.