Here's a game where Magnus played Stonewall as black. Good analysis.
The Stonewall Opening
Advice for White can be found in Chess Psychology: The Will to Win by William Stewart.
https://web.archive.org/web/20140708105336/http://www.chesscafe.com/text/review901.pdf
I havent seen people use it much(probably because of my horrible rating) but can anybody show me games with the stonewall attack since i rely on it most times and want to improve on using it