PKHeX/PKHeX.Core/Saves/Substructures/Misc/IGameSync.cs

namespace PKHeX.Core
{
    /// <summary>
    /// Provides details about the save file's Game Sync identifier.
    /// </summary>
    public interface IGameSync
    {
        int GameSyncIDSize { get; }
        string GameSyncID { get; set; }
    }
}