Unlock Extra for Yoshi's Island:
When ALL the requirements in every level are completed the Extra effect can then be accessed. When activated the shells will look like bubbleheads of Mario and the Pirahnas will have pumpking heads. To activate access any stage by pressing SELECT and then press A on the stage you wish to go to.
Unlock Different Colored Yoshis
Complete the corresponding tasks to unlock them
Unlock Red Yoshi:
On Star World 1 or Star World 4 find the Baby Yoshi and feed him 5 enemies.
Unlock Blue Yoshi:
On Star World 2 find the Baby Yoshi and feed him 5 enemies.
Unlock Yellow Yoshi:
On Star World 3 or Star World 5 find the Baby Yoshi and feed him 5 enemies.
Added by: Sanzano Jul 10th 2006, ID#8554