The Headbash ability enables Spyro to break certain rocks and special gem containers. The headbash is achieved by leaping into the air and then pressing the triangle button. Spyro will execute a forward somersault and launch himself downwards, horns first. Spyro can also drop into a Headbash from a glide by hitting triangle twice—first to Hover, then to Headbash.
In Spyro: Enter the Dragonfly, the Headbash ability is renamed the Horn Smash. Unlike other games, diving at any position outside of the out of bounds triggers for 8 seconds results an out of bounds penalty, in which cases, could subtract a life, or worse, result a Game Over, with an exception to mini-game sub-levels.
Horn Dive
In Spyro: A Hero's Tail, Spyro learns a move called the Horn Dive by talking to Elder Tomas. The move functions and moves exactly the same as the Headbash ability. Spyro needs to use the move in order to destroy the Dark Gems and break unbreakable steel chests.
Spyro's Earth Pound
In Skylanders, Spyro has the ability to use an Earth Pound. This attack is performed by flying into the air and then crashing down to the ground head first. It's a call-out to the Headbash ability from Spyro 2: Ripto's Rage!.[1]
Series 2 Spyro has a special Wow Pow ability that allows him to perform a powerful Earth Pound while spewing fireballs.