Originally Posted by Fat Shiny Regice
I used to 4th Gen RNG but it was just for shiny so it's not too plausible. Now I have a related question and I've been looking on Pokecheck and in all honesty, I see a lot of Pokes I need (turns out 3 Pokes will need tutor moves and 1 isn't 5th gen obtainable). I really am scared to use Pokecheck though as I just have no idea if the Pokemon will pass the legitimacy check. I heard editing a Pokemon in any way can cause a hack check to catch it but at the same time the stats on these mons are completely accurate as is the obtain info and moves.
If you want to use Pokecheck Pokemon, you need to have them uploaded via PokeGTS
to remove their event ribbon.
Also make sure you closely check all of the stats to make sure the moves learned are legitimately learned, the IVs are legal, etc.