Cards are going in and out of files constantly, and our ability to tightly control exactly how many of a certain type of card are in a set is harder than you might imagine
All in all, Internet Sensation is a bit of a mixed bag
It's one of these three: These are an awesome new bonus in every Prerelease Pack
Lithoform Engine is an incredible Swiss Army knife of nifty abilities and makes for a great mana sink for all the extra lands drops well be making

Mime Psychic Uncommon 111/132: Blaines Quiz #2 Trainer Uncommon 112/132: Blaines Quiz #3 Trainer Uncommon 113/132: Cinnabar City Gym Trainer Stadium Uncommon 114/132: Fuchsia City Gym Trainer Stadium Uncommon 115/132: Kogas Ninja Trick Trainer Uncommon 116/132: Master Ball Trainer Uncommon 117/132: Max Revive Trainer Uncommon 118/132: Mistys Tears Trainer Uncommon 119/132: Rockets Minefield Gym Trainer Stadium Uncommon 120/132: Rockets Secret Experiment Trainer Uncommon 121/132: Sabrinas Psychic Control Trainer Uncommon 122/132: Saffron City Gym Trainer Stadium Uncommon 123/132: Viridian City Gym Trainer Stadium Uncommon 021/132: Blaines Ninetales Fire Rare 022/132: Brocks Dugtrio Fighting Rare 023/132: Giovannis Nidoqueen Grass Rare 024/132: Giovannis Pinsir Grass Rare 025/132: Kogas Arbok Grass Rare 026/132: Kogas Muk Grass Rare 027/132: Kogas Pidgeotto Colorless Rare 028/132: Lt

One solution would be to just discard the 72nd card from each sheet, which is the error card (I am assuming this is technically possible, it apparently worked for the blank 1st card on the Jungle uncommons sheet, but I cant say for sure if its possible to discard a card from the middle of the sheet)