Where and how can I unlock Knuckles, Amy Rose and the Chaos Emeralds? I have only Sonic, Tails and Cream.
Games Guru: You unlock Amy Rose by beating Zone 4 Act 3 with Sonic as the leader. You unlock Knuckles by beating Zone 2 Act 3 with Sonic as the leader. To find each zone’s Chaos Emerald, you must unlock the special stage for that zone. To unlock the special stage, you must collect all 10 chaos found in that zone.