>>40125669Charizard is one of Ash's most reliable and strongest Pokemon. In the fight against Gary, it took down a Golem and Blastoise singlehandedly. It fought an Articuno in Battle Frontier and defeated it.
Infernape took down 3 of Paul's Pokemon, including the ever-powerful Electivire, and it is extremely powerful with Blaze.
It's just a coincidence that they're both Fire-type; for the most part though, Ash's Fire-type is usually the most prominent member of his team out of the three starter types.
Also note that I only picked Melmetal because it was nearly able to defeat Silvally, a powerful Legendary Pokemon, on its own. I would have picked Greninja otherwise, but Ash doesn't have it anymore.
