Then ask Kaphotics on this forum about that Shiny Flawless Naive Kyogre of yours. And if you don't know if it's possible or not, you just assumed that people on Serebii are trading you legit Pokémon. I'm on Serebii as well, and the people over there keep trading me hacks.
Again, about that Kyogre, I don't know anything about 3rd gen RNG abuse, but I do know Everything about 4th gen RNG abuse, and I know it's not possible there.
And, I agree that it looks kinda stupid that those people kept telling you the same. I saw that you edited your post and listed all the IV's and stuff like that. And no there's no rule about trading with people, but like others said, here are people interested in competitive usable Pokémon, which means they have to be flawless, near flawless or flawless with a usefull Hidden Power type. Some of your Pokémon are competitive useable, so I think you will have chances to trade those here on Smogon. :)