Gamepress omission: Graveler with rock slide

I was just looking at the list of pokemon that can learn rock slide, and it did not include Graveler in the current or legacy list. Also, the Graveler page on this site does not include rock slide as a legacy charge move.

I have a RT/RS Graveler caught on 8/20/16. I don't know if rock slide became legacy with the gen 2 release, or earlier, but Graveler actually has one of the higher base attack stats of the pokemon that can learn rock slide (edit: well, it's way behind Omastar, but close to all the others)..