If you mean original artwork as in all the sets the Pokemon has been featured in, here’s a general list: bulbapedia.bulbagarden.net/wiki/Charizard_(TCG)
If you’re looking for every variation, @quuador made a thread about different types here: www.elitefourum.com/t/list-of-all-tcg-cards-that-exist-for-a-specific-pokemon/16709/1