Identifying the size of the original image:
The first step is to identify the size of the original image. The mystery image will be displayed in the form of pixels that appear like colored boxes. Since the mystery image is enlarged to the extent that it makes it easy for us to count the number of pixels so first we will calculate these colored boxes. This can be done by counting them along the left/right edge and bottom/top edge of our mystery image. And the size of our original image will be:
(Number of colored boxes along the right/left edge) x (Number of colored boxes along the top/bottom edge) pixels.
Note this size as this will help you choose the image from the neopets.com.
Resizing the image
Now in order to refine our search more, resize the image to the original size.
Selecting the Image that looks like the mystery image:
Now open the neopets.com in your browser and compare the resized image with the ones found on the neopets website. Pick an image that matches with the mystery image in colors.
Once you pick an image that appears to be the match, open an image editing tool like Photoshop and zoom in. Now that you have got the chosen image enlarged, you can now easily compare all the colored boxes in the mystery image with the chosen image. The right image will be the one that matches exactly with the mystery image. Keep on searching until you get the right image.