PKHeX/PKHeX.Core/PersonalInfo/PersonalInfoG4.cs

using System;
using static System.Buffers.Binary.BinaryPrimitives;

namespace PKHeX.Core
{
    /// <summary>
    /// <see cref="PersonalInfo"/> class with values from Generation 4 games.
    /// </summary>
    public sealed class PersonalInfoG4 : PersonalInfoG3
    {
        public new const int SIZE = 0x2C;

        public PersonalInfoG4(byte[] data) : base(data)
        {
            // Unpack TMHM & Tutors
            TMHM = GetBits(Data.AsSpan(0x1C, 0x0D));
          //TypeTutors = Array.Empty<bool>(); // not stored in personal -- default value
        }

        public override byte[] Write()
        {
            SetBits(TMHM, Data.AsSpan(0x1C));
            return Data;
        }

        // Manually added attributes
        public override int FormCount { get => Data[0x29]; set {} }
        protected internal override int FormStatsIndex { get => ReadUInt16LittleEndian(Data.AsSpan(0x2A)); set {} }
    }
}