Sankaku Channel/

Tallcat said:

In addition, a bunch of Pokemon related images you've flagged are the superior version and I'm not going to unflag, properly tag the parent, and delete the correct one for each. Please take filesize into consideration as I also failed to do earlier.

From what I understand, the image that should stay on the site are the biggest ones. If it happens that there are two of the same pics, the one that shoould prevail are the ones that come from official sources like Pixiv, Nijie, Tumblr, NicoNico and blogs. If they come frome Twitter (like the ones I flaged), then they should be deleted unless they are bigger and better versions.
Correct me if I'm wrong please, but that's what I have learned according to how many of my pics have been deleted.