pokemon mega evolution booster box ME1 Enhanced Boxes (2-Pack) : Target Mega Evolution booster packs Each booster pack contains 10 cards and 1 Basic Energy Pokemon Trading Card Game: Mega
Description
once they sell out for the day, the remaining packs will be offered to general customers
As a result, it saddens me to say that Serperior/Darkrai EX will most likely not be the strongest choice for Fall Battle Roads or Fall Regionals unless the format turns out differently that expected

In this region, electromagnetic towers provide energy to its inhabitants, but the radiation produced by these towers transforms the DNA of the Pokmon and creates a new species of Pokmon, the Delta () whose types change

Since all boxes containing them are out of print, TR cards usable in the current Standard format, like Nest Ball or Ultra Ball, are sold at high prices of around 5,000 JPY (~US$34)

As of writing this, it available for Windows, MacOS, and in the App Store and Play Store, but it cannot be played on smart phones (only on iPads and Android tablets)
