Unlocking Dark Spyro 
     In  order to be able to do this, you first have to beat the story
mode.  When you have beaten story mode, go to the main menu and select
extras.  Load the save file with your completed game. Click on "dragon
challenges"  and  beat  all  five of them. When you are successful the
game  will  tell you that you have unlocked Dark Spyro. Go back to the
main  menu,  load  your  game  again  and save it. Use the the element
change  button  until  you  reach Dark Spyro (it's the last one in the
elements sequence).