[Lucid:]

Inari, that quote has nothing to do with the dragon type's existence. Dragon type existed in Gen 1. That quote means that dragon-type moves used to use the special stat in the damage calculation, along with psychic, water, fire, grass, et cetera. Ghost, Fighting, Normal, Poison, et cetera used the attack stat.

I don't agree that Gyarados and Charizard are dragons. Just because Bulbapedia describes them as looking like dragons doesn't mean anything. Arcanine is a "legendary pokemon" according to early pokedex entries, because he's based on a legend. But that doesn't make him a legendary pokemon at all, just like Gyarados being based on Chinese dragons does not make him a dragon pokemon.