CODE EXAMPLE FOR JAVASCRIPT

change x scale phaser

function preload ()
{
    this.load.image('atari', 'assets/sprites/atari130xe.png');
}

function create ()
{
    //  setScale sets the x and y scale values (1 = no scale)
    this.add.image(400, 100, 'atari').setScale(0.5, 1);

    this.add.image(400, 300, 'atari').setScale(2, 1);

    var image2 = this.add.image(400, 500, 'atari');

    //  You can also set the scale via the scaleX property:
    image2.scaleX = 2.5;
}