If it is a Wondertomb, it's fake. If it is an event Pokemon, put in using a hacking device but still being caught in the same way, it's legal. But not legit.
So, effectively, if you have an Arceus that you caught at Route 1, it is fake.
If you caught it at Spear Pillar, it's legal, but not legit, as Arceus' event has not yet happened.
Does that explain it?
There is legal, meaning it COULD exist in the game but has been made with an external device, legit, meaning it is un-touched, not modified or put in with the help of external devices, and illegal, like Wondertomb.
So the PokeSav pokemon which I'd give you, which are just the original wonder card inserted into the game by PokeSav would be legal, but not legit.
I could give you LEGAL event pokemon, but not legit ones. I download the wonder card files off the Pokesav Database... As you know, not many events in NZ...
Yep. I have been to that there place. How old are you? I'm in year 10...
EDIT: I see you are in year 11, which means that you must be at school.
I'm off sick with asthma...