This pattern is written up so that you may use any weight yarn you prefer. Just remember to adjust the size of your hook and safety eyes as well.
This is a good project for stash busting because you can make the kitty in any color combos you want. This is what I did for the most part which is why I did not include which yarns I used (because I lost their labels lol)
Anyway, this kitty plushie also comes with instructions on how to make some basic clothing for it as well. These instructions come with both the stitch count I used, as well as instructions on how to draft your own if your plushie ends up being a different size than mine.
If you have any questions about working up the pattern, feel free to message me.