Sonic egg:
Collect all five coins in each world to have access to one Sonic egg in every
world.
Play as Bantam Scrambled:
Successfully complete the Save Bantam mission (Blizzard Castle mission 4).
Play as Chick Poacher:
Successfully complete the Save Chick mission (Dino Mountain mission 4).
Play as Rolly Roll:
Successfully complete the Save Rolly mission (Pirate Island mission 4).
Bonus emblems:
Successfully complete one of the following tasks to unlock an emblem: complete
all missions with an "S" rank; collect all coins; complete all missions;
unlock the entire Egg Gallery.
Sites: