This would later be addressed, at least in temporary fashion, in Pokmon X/Y where Charizard gained the ability to Mega Evolve into the mighty Mega Charizard X, a Fire and Dragon-type with black scales and blue flame
It has huge competitive potential, and its worth keeping an eye out for
Sarkhan Unbroken Sarkhan Vol Sarkhan the Mad Sarkhan the Masterless Sarkhan's Catharsis Sarkhan's Dragonfire Sarkhan's Rage Sarkhan's Resolve Sarkhan's Scorn Sarkhan's Triumph Sarkhan's Unsealing Sarkhan's Whelp Sarkhan, Dragon Ascendant Sarkhan, Dragonsoul Sarkhan, Fireblood Sarkhan, Soul Aflame Sarkhan, Wanderer to Shiv Sarkhan, the Dragonspeaker
We've got the full deck list breakdown, combos, and more
In decks that care about creatures entering and leaving the battlefield, this does real work