How to add Event to every single pixel with BitmapData?

I think you're looking for MouseEvent.MOUSE_MOVE. Note there are lots of pixel manipulation examples at flashAndmath.com.

if mc is the object whose pixels you want to randomize and display in a bitmap:

var bmpd:BitmapData = new BitmapData(mc.width,mc.height);

bmpd.draw(mc);

var bmp:Bitmap = new Bitmap(bmpd);

addChild(bmp);

mc.visible=false;

mc.addEventListener(MouseEvent.MOUSE_OVER,randomizeF);

function randomizeF():void{

    var a:Array = [];

    for(var x:int=1;x<=bmpd.width;x++){

        for(var y:int=1;y<=bmpd.height;y++){

            a.push(bmpd.getPixel32(x,y));

        }

    }

    shuffle(a);

    var i:int=0;

    for(x=1;x<=bmpd.width;x++){

        for(y=1;y<=bmpd.height;y++){

            bmpd.setPixel32(x,y,a);

            i++;

        }

    }

}

function shuffle(a:Array) {

    var p:int;

    var t:*;

    var ivar:int;

    for (ivar = a.length-1; ivar>=0; ivar--) {

        p=Math.floor((ivar+1)*Math.random());

        t = a[ivar];

        a[ivar] = a

;

        a

= t;

    }

}