I think it should be his Highest Power Transformation. Like MegaMan's attack weapons,Spyro will gain power with every Smash Power Orb. He would Starts as him himself. After he gets a Power Orb he can either use Special Attacks. Spyro has Fire, Ice, Electricity, and Earth as Special Attacks.The more Power Orbs collected, the Stronger the Special Attack. Spyro also uses Time and Darkness as Special Attacks.Spyro's Time would be Stopped for a short period, while stopped allows the Character to Attack.Spyro's Darkness, a Dark Side Taking Over, attacks with Black Fire.
Spyro can either use these Special Attacks or he can Attack with a Final Attack. For Spyro's Final Attack, I suggest his Dragon Fury Attack.Dragon Fury is a Attack that Comes From Multiple Directions and Angeles