How do you beat Gnasty Gnorc in Spyro The Dragon?

There are many different techinques, but I found this one to be most helpful. First, if you would like to turn on the "Eternal Health" cheat by pausing the game, pressing Z (on a Wii), and moving the analog stick in the Right, Right, Down, Down, Left. For "Eternal Mana" cheat: (on a Wii) pause the game then press and hold Z while moving the analog UP, Right, Up, Left, Down.

Right before Malefor uses an elemental attack, use Spyro's Fire, Elemental 2 move repeatedly to hit him and stop the attack.

When Malefor uses Fury Breath, use Cynder's Wind, Elemental 2 attack, or Spyro's Ice Elemental 2 attack to shield yourself.

Hope it helped! ^^