GEmeTool/create_shiny_folder.pl

#!/usr/bin/env perl

use v5.16.3;

use strict;
use warnings;

use Path::Tiny;

my $pokemons_dir = path 'pokeemerald/graphics/pokemon/';
my $tempdir      = Path::Tiny->tempdir;
my $shiny_dir    = path 'resources/shiny';
$shiny_dir->mkpath;
for my $pokemon_dir ( $pokemons_dir->children ) {
    my $bpp = $tempdir->child( $pokemon_dir->basename . '.4bpp' );
    say $pokemon_dir->basename;
    my $front = $pokemon_dir->child('front.png');
    my $shiny = $pokemon_dir->child('shiny.pal');
    if ($pokemon_dir->basename eq 'unown') {
        $front = $pokemon_dir->child('z/front.png');
    }
    if ($pokemon_dir->basename eq 'castform') {
        $front = $pokemon_dir->child('normal/front.png');
        $shiny = $pokemon_dir->child('normal/shiny.pal');
    }
    system './pokeemerald/tools/gbagfx/gbagfx',
      $front, $bpp;
    system './pokeemerald/tools/gbagfx/gbagfx',
      $bpp, $shiny_dir->child( $pokemon_dir->basename . '.png' ),
      '-palette', $shiny, '-mwidth', 8, '-object'; 
}