PKHeX Documentation

dotnet add package PKHeX.Core

Install-Package PKHeX.Core

using PKHeX.Core;

byte[] data = File.ReadAllBytes("path/to/save.sav");
var sav = SaveUtil.GetVariantSAV(data);

if (sav == null)
{
    Console.WriteLine("Invalid save file!");
    return;
}

Console.WriteLine($"Loaded: {sav.GetType().Name}");
Console.WriteLine($"OT: {sav.OT}");
Console.WriteLine($"Game: {sav.Version}");

// Get the first Pokémon from Box 1
var pk = sav.GetBoxSlotAtIndex(0, 0);

Console.WriteLine($"Species: {pk.Species}");
Console.WriteLine($"Level: {pk.CurrentLevel}");
Console.WriteLine($"Nickname: {pk.Nickname}");

// Modify the Pokémon
pk.CurrentLevel = 100;
pk.Nickname = "CHARIZARD";

// Write it back to the save
sav.SetBoxSlotAtIndex(pk, 0, 0);

// Validate the Pokémon
var la = new LegalityAnalysis(pk);
Console.WriteLine($"Legal: {la.Valid}");

if (!la.Valid)
{
    foreach (var result in la.Results)
    {
        Console.WriteLine($"- {result.Comment}");
    }
}

// Export the modified save
byte[] exportData = sav.Write().ToArray();
File.WriteAllBytes("path/to/modified.sav", exportData);