CGC just authenticated and certified some bizarre Team Rocket Test Print Cards.  

“These two test prints are extremely interesting in that they have the fronts of holofoil cards on both sides! While one side has the typical Cosmos holofoil pattern used on the set, the other side features a plainer foil. Additionally, the cards are miscut to a smaller size than normal and show four cards on each side. Because the cards are test prints, the miscut is not noted on the label.”

Dark Raichu Front
Dark Dragonite Back


The article covers the cards printing history, and how they were authenticated.  

You can read the entire detailed article at CGC’s website.  It’s a fun read.