*pours one out for DBZ Uncensored*Dragon Ball Z, Sailor Moon, Yu-Gi-Oh, Digimon, Shaman King, Card Captor Sakura, Tokyo Mew Mew, and Escaflowne all had entire sites specifically about covering the changes made by their TV dubs...and the only reason Pokemon didn't was because one of the larger general-purpose sites already covered it.
Given the nature of the reason behind the change from Slag to Slug (as stupid as I may find it to be), I can see why Hasbro wouldn't want to use the old name any further, even on "older" product.I also disagree with the claim that adding entire new concepts like "Phase six" or "the Allspark" into Japanese G1 is somehow a smaller change than merely changing Slag's name (which never has and probably never will be retroactively applied to newer releases of older media anyway).