Override Function and add variables?

public virtual void StartSpawnAnimation()
    {
        Debug.Log("Test");
    }

public virtual void StartSpawnAnimation()
    {
        Debug.Log("Test");
    }

public override void StartSpawnAnimation(bool Something)
    {
        Debug.Log(Something);
    }

public override void StartSpawnAnimation(bool Something)
    {
        Debug.Log(Something);
    }