Actually, on the Dokkan Subreddit someone has already made every Dokkan Artwork available to be HD using a browser application which I don't have for me on hand. I don't want to assume, but it could be that this guy took it from there or used the same application.
That's why i suggested Team disambiguations , so that members of certain teams would be in a page , like AGL Zangya of the hera clan . Possibly a Hera clan disambiguation and there are others that it would work for too .
Thank for making the HD artworks. I don't always have the time to replace the picures so I thought I'd teach you how to so you could do it yourself if you want. Copy the name of the artwork, Click Edit Page, Select the File name of the old artwork and click paste.then click publish.