Hi, How i Make double jump animation system using 2D mode in unity?
I think this:
if (Input.GetKeyDown (KeyCode.Space) && Pulo == 1) {
anim.SetInteger("estado", 1);//Jump one
}
if (Input.GetKeyDown (KeyCode.Space) && Pulo == 2) {
anim.SetInteger("estado", 2);//Jump two
}
if(!grounded){
anim.SetInteger("estado", 3);// Falling animation
}
But not work! 
In my animator, I make a Parameter - Bool and name it Jump, and if it True the player go to Jump animation and if it false it go back to normal or walking animation.
But you also want a fall animation and one more jump animation, so create one more bool name it Jump2.
then in the animator under theirs condition use a Exit Time and set it to 5.00, that it will go into the fall Animation.
and on the fall animation set if jump and jump2 is false and Exit Time 8.00 go to Idle.
I post a Image so it will be easy
Code
var jump : boolean = true; //Can you jump
var jumpspeed : int = 5; //How high you can jump
var howmanyjump : int = 2; //How many jump you can make
var addjump : int = 0; //Count up how many jump you made
var anim : Animator;
function Update () {
if (Input.GetKeyDown (KeyCode.UpArrow))
{
if (jump == true)
{
addjump += 1;
rigidbody2D.velocity.y = jumpspeed;
anim.SetBool("Jump",true);
if ( addjump == 2 )
{
anim.SetBool("Jump",false);
anim.SetBool("Jump2",true);
}
if (addjump >= howmanyjump)
{
jump = false;
}
}
}
}
function OnCollisionEnter2D(other : Collision2D)
{
if(other.gameObject.tag == "Ground")
{
addjump = 0;
jump = true;
anim.SetBool("Jump",false);
anim.SetBool("Jump2",false);
}
}
hope this help.