Board Thread:General Discussion/@comment-27126773-20151104212704/@comment-1038387-20151104213459

At all times, it's a screenshot of a game you didn't create, even though you did "create" the subject. Screenshots can be used with Fair Use.

"I created this picture" is for photographs, artwork etc. that you made yourself - where you are the artist and copyright owner.

As for changing large amounts of info, see Help:Bots. PyWiki is definitely able to do it; AWB should be able to do it too, and that's easier to use.