Wild pokemon RNG Abuse? (3rd Gen)

Hi.

I'm new here, i just wanted to ask..

How can i RNG Abuse a wild pokemon in Pokemon FireRed?

I'm a total novice when talking about RNG.. the only thing i did in my life was to get a Shiny Shinx egg in Platinum, and after that, never tried this.. method again.

Now i'm playing again FireRed (Using VBA 1.7.2 Link) and i wanted to ask that.. if i can get a Wild RNG Abused Pokémon (31 IVs in the important stats, specific nature, shiny)

I'll be waiting for your comments, thanks for reading <3

(Oh, i also know how to find my seed, but thats the most far i know )

Cya~