PKHeX/PKHeX.Core/PKM/IShadowPKM.cs

namespace PKHeX.Core
{
    /// <summary>
    /// Interface that exposes Shadow details for the object.
    /// </summary>
    /// <remarks>Used only for Colosseum/XD <see cref="PKM"/> that were shadow encounters.</remarks>
    public interface IShadowPKM
    {
        int ShadowID { get; set; }
        int Purification { get; set; }
    }
}