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1. “Additional software was installed to make it a better Pokémon. It began acting oddly, however.”

   First printed on Great Encounters #6 · 2008 · Illus. Kent Kanetsuna

   • Great Encounters #62008 · $8.83

2. “Its programming was modified to enable it to travel through alien dimensions. Seems there might have been an error…”

   First printed on Triumphant #7 · 2010 · Illus. Kouki Saitou · on 3 cards

   • Triumphant #72010 · $8.90
   • Ancient Origins #662015 · $0.35
   • Ancient Origins #672015 · $3.13

3. “Its programming was modified to enable work in alien dimensions. It did not work as planned.”

   First printed on BW Black Star Promos #BW84 · 2011 · Illus. 5ban Graphics · on 2 cards

   • BW Black Star Promos #BW842011
   • Plasma Blast #742013 · $4.80

4. “In order to create a more advanced Pokémon, an additional program was installed, but apparently it contained a defect that makes it move oddly.”

   First printed on Burning Shadows #105 · 2017 · Illus. MAHOU

   • Burning Shadows #1052017 · $0.47

5. “Its behavior is noticeably unstable, which is apparently due to the incompetence of the engineer who updated its programming.”

   First printed on Unbroken Bonds #157 · 2019 · Illus. Misa Tsutsui

   • Unbroken Bonds #1572019 · $1.51

6. “A faulty update was added to its programming. Its behavior is noticeably strange, so the experiment may have been a failure.”

   First printed on Chilling Reign #118 · 2021 · Illus. Tomokazu Komiya

   • Chilling Reign #1182021 · $0.92

7. “Porygon-Z had a program installed to allow it to move between dimensions, but the program also caused instability in Porygon-Z's behavior.”

   First printed on Lost Origin #142 · 2022 · Illus. Shibuzoh.

   • Lost Origin #1422022 · $0.26

8. “Some say an additional program made this Pokémon evolve, but even academics can't agree on whether Porygon-Z is really an evolution.”

   First printed on Paradox Rift #144 · 2023 · Illus. hatachu · on 2 cards

   • Paradox Rift #1442023 · $0.20
   • Paradox Rift #2142023 · $15.21

Every quote above is printed on the card it links to. Card text and images © their respective owners.