caught and trained all these Pokemon myself in other regions, and they were transferred via Pokebank. No blue pentagon. The pentagon legitimately only means that they were born in Kalos. pls stop telling people it means their Pokemon are hacked, it upsets people sometimes and causes them to give away potentially legit Pokemon.
however, if you see a Pokemon that only exists in Kalos without the Pentagon, that DOES mean it’s hacked, but that’s the only time when it’s an indicator