Pokémon of the Week: Ponyta!
Ponyta's ability, Flash Fire, causes it to power up if it is hit by a Fire-type move, and causes the move to have no effect. Ponyta, as a Fire-type, is capable of using a variety of Fire-type moves, and is one of the few Fire-type Pokémon capable of using Flame Wheel. As Ponyta’s hooves are quite hard, being ten times harder than diamonds, it is able to trample anything flat in little time.
Source: Bulbapeida: Ponyta