It depends on what Pokemon you have.
For example,If you have a Feraligratr, use Ice Fang.
If you have a Typhlosion or Meganium,spam your most powerful move.
Ice type Pokemon can.
Might not work with all fire types, but I taught my arcanine dragon pulse
by capturing an ice pokemon in the ice cave by capturing a dragon type pokemon but dragon is weak against dragon so just capture an ice pokemon
In Blackthorne city there is a lady that will give you draco meteor as long as you have a dragon type pokemon
It's only proper weakness is dragon type moves
Make sure you have a strong dragon type Pokemon (Clair is dragon type and dragon is super-effective against dragon.) and a strong grass or electric type. I suggest all level 40s. Bring lots of health potions.
go to the next town and face Claire she has dragon Pokemon so use ice Pokemon and dragon type moves
Lance, the Dragon-Type master is the champion of the Elite Four. Red can also be battled at Mt. Silver, but he is much stronger than Lance.
What do you do?You get past the lava thing after a few mins ur front of Claire. She Dragon type. Ice and dragon types are effective against her.
You go to the move tutor place and the women would teach your dragon type Draco meteor.
Strong Dragon type Pokemon. Such as Dragonite, Dragonair, Dialga, Palkia, Giratina, Latias, Latios,
After winning seven badges, head east from Mahogany Town. Enter the cave on the mountain. Traverse through it. After getting through it, you will be in Blackthorn City. The Gym in this town is Dragon-type, so be careful! Hope this helps!