I never new ash had a dragon type pokemon!
but I really loved it when couldn't control Charizard, and lost the emm first league(don't know if that's what they call it) because of it. ash losing made me sad, extremely sad, but it also made it feel much real, and much more connected to the character, I don't want always winning, I want ash to be one of us, we sometimes lose and sometimes win, life. (I always get out off topic lol)
ash would never catch emmm rock, psychic, and dark (but then again, I only watched the first season so, what do I know right ;p)