I mission completed = i emblem
Its not in Sonic Heroes, Plain and simple. You're wasting your time if you think this stage is in Sonic Heroes. When You collect all the emblems, all it earns you is Super Hard Mode.
120 embles
You have to collect 10 Sonic emblems to get a continue.
They are Trophies you get that tell you that you finished a level + did it well
You have to get all the chaos emralds in the bonus stages
Collect emblems
Collect emblems
Collect a lot of emblems
it depends if metal sonic is in your game and if he is you are going to have to get farther in your game and he is not in all sonic games but he is in sonic adventure two battle sonic DX sonic gems collection sonic mega collection and others
Just like thishttp://sost.emulationzone.org/sonic_adventure2/world_ranking/emblem.jpg
You can't
You need to complete all 4 stories,so if you don`t do any stages other than those in story mode,it is 56 emblems.