Defeating Red
Dodge all of his attacks, including his mines, laser eyes, and jet flames. Eventually he will turn to normal and stand still. Then, some rockets will appear. Light them with your flame breath. It will hurt Red. The whole thing starts over again. Use the same tactics. After that, dodge his attacks again and some gadgets will appear. Light them with your electric breath. It will hurt Red. Keep dodging his attacks and lighting the gadgets with your electric breath. You will eventually defeat him.
Secrets
Collect the indicated number of Dragon Eggs to unlock the corresponding option in the "Secrets" menu.
Blink Mini-Games: At least 71
Concept art: 1
Character Viewer: At least 11
Ember Model: At least 21
Flame Model: At least 31
Sgt. Byrd Mini-games: At least 41
Sparx Shooter Mini-games: At least 61
Spyro Turret Mini-games: At least 51
Alternate Ending...