The Legend of Spyro: The Eternal Night Hints for Wii
There are plenty of movesets that you could use to defeat an opponent, when you do a triple jump you can press A twice then be. Get close enough to an opponent and then send out an attack that is either Ice, Fire, Electric, and nature/earth. Each one that you learn to use at throughout the game.
To do a triple jump, you do your regular double jump and then press B while in the air.
You can easily defeat the scorpions by either using a fury (easy way) or by using your knock-up attack to force their claws open and regularly attack them when their claws are open (hard way).