Unfortunately, the provided search results do not contain information about a specific image file or its conversion. However, we can use the fast-png library to convert an image from one format to another.

To achieve this, you would need to:

1. Download the image from www.xbox.com
2. Convert it to PNG using fast-png
Here's a simple example of how you could do this in JavaScript:

const fs = require('fs');
const fastPng = require('fast-png');

// Download the image (this is omitted for brevity)
// ...

// Convert the image to PNG
fastPng(image, 128).then((png) => {
  // Save the PNG image
  fs.writeFileSync('output.png', png);
});

Please note that this example assumes you have already downloaded the image and have it stored in a variable named image. Also, be aware of any copyright or licensing restrictions when using images from websites like www.xbox.com.