Where and how to find a shiny Pokémon in Pokémon FireRed / Emerald?

Question

Where to find a shiny Pokémon? I watch in trade catch in PokeMMO, all got shinies. Where they find them? They said check Google, I checked and found nothing. What route for shinies, example shiny Gastly, how to find them? I know Gastly can found in Pokemon tower, but where in Pokemon Tower? OK...Where to find a rare shiny Pokémon?

Another question: Can shinies evolve, and will they will remain shiny?

Comments

This grammar and spelling makes me cringe, but I answered anyway lol

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i know this is 7 years old but i edited to the best of my ability anyways

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What's Pokemmo?

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A Pokémon fan game.
This question is technically about a "fan game", are those questions allowed?

Answer 1

A shiny Pokemon has a 1/8192 chance of appearing. There is no specific place to find them. They can be found anywhere at any time. So you could go to Pokémon Tower and encounter over and over until you find your shiny Gastly. Since the odds are extremely low, you might have to run away from Pokemon hundreds, or maybe thousands of times.

And yes, a shiny Pokemon will stay shiny through evolution, just like a normal Pokemon would evolve into a normal one.

Hope I helped!