How do you tell if a Pokémon is hacked?

[Black117]

In truth, one of the few ways to determine if a Pokemon is "hacked" is via checking the Memory Girl from each respective titles (forgot where IN-game), and see from this list. Mostly this guide is used to check if legendary Pokemon are indeed "hacked" as they have to coorespond to certain locations. If any pentagon (Gen 6-born) Pokemon doesn't have any memories at all means it is likely hacked as only gen 5 and below Pokemon have this trait. Just people a Pokemon from gen 5 or below don't have a pentagon doesn't mean they are hacked. Aside the internal hack checks in GTS/Pokemon Battle Spot, there's very few options to determine if a Pokemon is "hacked".