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) to unlock Bantam Scrambled.
Play as Chick Poacher
Successfully complete the Save Chick mission (Dino Mountain mission 4) to unlock Chick Poacher.
Play as Rolly Roll
Successfully complete the Save Rolly mission (Pirate Island mission 4) to unlock Rolly Roll.
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.
Easy rolls
Instead of trying to beat the egg you roll down the point you have to catch it before it roll off a cliff, roll with the egg by jumping then pressing R while rolling on the tracks.
Game Boy Advance eggs
Find and hatch the following bonus eggs in the corresponding locations to unlock a downloadable Game Boy Advance mini-game:
Chu Chu Rocket: Pirates island 2
Nights: Circus Park 2
Billy Hatcher Hyper Shoot Easy: Dino Mountain 2
Billy Hatcher Hyper Shoot Hard: Sand Ruin 2
Puyo Pop: Blizzard Castle 3
