[Mika]

.... In gen 1 and 2 there is dragon TYPE. Dratini line is dragon type. I know. I grew up playing it. I know my copies of red and blue inside and out. I have no idea where you got that information. Not from playing the game. Dratini and Dragonair were single typed dragon, where dragonite is dragon and flying.

None of those pokemon are considered a dragon in any aspect beyond appearance. They don't even learn dragon type moves naturally. Charizard and Aerodactyl learn it by TM, gyarados does learn it naturally. Even then, Charizard and Aerodactyl don't even get it for super-effective hit, since Dragon rage is a fixed damage move. For all extensive purpose to use either as a "Dragon" pokemon is absolutely useless. Pseudodragon maybe, due to the appearance alone. At least Gyarados gets Twister, but twister wasn't released till Gen 2.

The flying pokemon that Lance use are only there because they learn dragon moves. Be it naturally or TM. (Aerodactyl learns dragon rage from TM.) Charizard wasn't given to him for the fact that it's a starter pokemon and for some reason or another Gamefreak deemed it best not to give Gym Leaders or Elite Four any starter pokemon or their evolutionary lines.