So knowing this about the first two Pokemon in this line and looking at this specific Porygon-Z, the main reason you would want to use this card in a deck is for its Digital Reboot move, the reason you would want to use this move so often is to be able to reuse an Ability from let's say a Stage 2 Pokemon every single turn, like Aggron from Dragons Exalted (if you're playing in the expanded format) where you can use its Toppling Wind Ability to discard the top 3 cards of your opponent's deck every single turn and hopefully be able to win the game that way
Power Packs have been live for several months now as part of a collaboration with card-grading site PSA, allowing customers to spend a flat amount of money to rip a digital card pack that has a single PSA-graded sports or Pokmon card in it
Living End could create a similar issue by creating an instant and generally unassailable board as early as turn three
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HP180 Stage 2 Pokemon Evolves from Dragonair Retreat: Card Illustrator: Sanosuke Sakuma Pokemon 151 No: 149
There are several strong Ultra Beasts that could greatly benefit from two free energy