My new shiny porygon-z says this on it's summary
apparently arrived at lv. 100
what kind of region is ----------?
It literally has dashes in the summary?
Where did you get this Porygon? GTS?
It's probably hacked.
If this was NOT migrated from an older game as Porygon2 or Porygon, it's probably hacked.
Porygon-Z cannot be obtained at Lv 100 unless migrated.
Chcek events on Serebii, it's probably event one.