Problems making a smash bros like camera

My suggestion : You need to do tutorials provided by unity http://unity3d.com/learn/tutorials

 public bool canFocus = true ;
 //You could play with the zoomValue in inspector in play mode
 [Range(1f , 100f)]
 public float zoomValue ;
 
 private Camera _camera ;
 
 void Start()
 {
     if (!_camera)
         _camera = Camera.main ;
 }
 
 void Update()
 {
     if (canFocus)
     {
         //call the function from below as per your camera ;
     }
 }
 
 //Orthographic projection is used for 2D games
 void FocusInOrthographicView()
 {
     //See your Main Camera setting If the projection is set to Orthographic use this
     _camera.orthographicSize = zoomValue ;
      
 }
 
 //Perspective projection is used for 3D games
 
 void FocusInPerspectiveView()
 {
     //Is the projection is set to Perspective use this
     _camera.fieldofView = zoomValue ;
 }