I just made this Pusheen Computer cross-stitch pattern. Feel free to try it out if you like. You can click the image to enlarge and download, or click on the PDF at the bottom link on this post. (I recommend cropping the image with just the Pusheen, and then you can print it on an 8-1/2×11 paper in Landscape enlarged to the size of the paper.) If you end up making it, let me know. I’d love to see it! I imagine it would work well with 18 count cross-stitch fabric, because there are about 18 squares per inch on this image. However, I think you could do any size. It took me a lot of time to make this, and I hope there aren’t any mistakes, but if you find an issue, let me know. Thanks! Click this link for the PDF version: PusheenWithBoxes.
UPDATE: Below is an image with the grid on top. It makes it a little easier to count the X marks. Also, here is the PDF with the grid on top: PusheenWithBoxesOnTop.
UPDATE 2: Here is another version with darker boxes on top. Here is the PDF: PusheenWithBoxes80PercentBoxes