So does PokeStation considered to be a hack/fake if you get there Pokemon from there or is it ok to use?
It depends on whether or not the Pokémon you get from there is hacked or legitimate. Sites like that use something called .pkm files. If the Pokémon was not modified before being converted into a .pkm file, then it should be OK to use. If it was modified, then it would be considered a hack. I've also noticed that on that website they have an online Pokésav. Any Pokémon you get or create from there will be considered a hack.
Just to be safe though, I personally wouldn't use any of their services. I'd rather acquire my own Pokémon through breeding and trading.
PokeStation runs a fake Wi-Fi event site for people who couldn't attend the actual events. The Pokemon they give out are based on the number of votes for the specified event and are
replicas of Pokemon given away at the events. It's up to you to decide if this is a hack or not--the site functions similarly to the way official events run (and distribute official-looking Pokemon), but isn't official. However, they make and transmit them the same way the events do, so there's really
no difference except who is giving them out.
It's a nice idea for players who live in areas without events (since their Wi-Fi is global), but it gets out of hand because you can get infinite of any Pokemon they are currently giving out on one cartridge. But then again, what's stopping you from bringing more than one cart to an actual event?
However, it's generally good form to
avoid redistributing / trading the Pokemon. PokeStation was made to help players obtain events they couldn't get normally, not give you bargaining chips for other valued Pokemon. You are intended to keep what you get for yourself--not depreciate the value of everyone else's hard-earned event Pokemon. Plus, the added kind-of controversy about it should be avoided too. So yeah, keep them for yourself, train them, battle with them, breed them, but
don't trade them.