Ponyta, a Fire Horse Pokémon. Its mane is made of intense flames.
– Ash’s Pokedex
Ponyta is a fire horse Pokemon, appearance-wise, I think it is one of the prettiest. Its Pokedex entry says it’s only 1m tall, but in the anime, they made it look bigger and more rideable.
Stat-wise, Ponyta is fast, and has higher Attack than Sp Attack. One of its abilities is Flash Fire, which makes it immune to Fire type attacks.