To breed a shiny Charizard, you will need a male and female Charmander or Charmeleon. Both parents should be holding a Shiny Charm and a Destiny Knot. You will also need to have an empty space in your party.
Once you have the necessary Pokémon and items, you can begin breeding. Simply put the male and female Charmander or Charmeleon in the Day Care and they will eventually produce an egg. The egg will hatch into a shiny Charmander or Charmeleon if the parents are holding the correct items.
You can then evolve the shiny Charmander or Charmeleon into a shiny Charizard by using a Fire Stone.
It is important to note that the chances of getting a shiny Pokémon through breeding are still relatively low. However, this is the easiest and most reliable way to get a shiny Charizard.
Here are the steps on how to get a shiny Charizard through breeding:
1. Obtain a male and female Charmander or Charmeleon.
2. Give both parents a Shiny Charm and a Destiny Knot to hold.
3. Put the parents in the Day Care and wait for an egg to be produced.
4. Hatch the egg. If the parents are holding the correct items, the egg will hatch into a shiny Charmander or Charmeleon.
5. Evolve the shiny Charmander or Charmeleon into a shiny Charizard by using a Fire Stone.