one point I thought it was counterfeiters, in some cases it is where people is just simply adding a stamp to some shadowless base cards.
But it could very well be people at TPCI or WOTC doing it without permission.
As a guy who done alot of buying/selling/trading of base cards, most will know the color, more noted the color within the holofoil fades after a few years. Then I ran across this gem:
http://imageshack.us/photo/my-images/803/004sb.jpg/
You can try as you might to get an angle on any charizard card you wish, you wont EVER get that rich color. Thats the type of coloring of base cards after they were freshly printed. It was done recently because it had other cards in the picture thats very recent.
Some cards within the packs will be a little brighter, but they fade way more than that card in the pic has.
Take example the 1913 Liberty Nickel as prime example of someone at the mint producing a few copies to sell out, this point the Liberty Nickel was stopped in 1912 in favor of the Buffalo Nickel for 1913.
Also note we keep running into as many Charizards of Base 1st Edition than we do Unlimited it seems, if indeed this is being done without permission, their is no telling how many of them were produced like this.
More food for thought is we know The Pokemon Company is on a limited budget, very limited, so to have someone within the company doing this is highly likely as well, more so than someone at WOTC. If you got a limited budget, you dont have the security, they may have 1 guy running the whole process through machine for all we know. Reason I think this could be done in Japan (assuming Japan and English have 2 different printing processes in 2 different locations) I will get to that later on when I translate the page. It could be being done at both places.