Edit: I apologize - I misread your message. Unfortunately I'm still not interested as the fact that it has flawless IVs (and nature) is almost impossible, so I can confidently say it is hacked. The Dialga itself may be legit, but the IVs (and possibly nature) are hacked, and that may mean its shininess is likely hacked as well. Also, it's nicknamed which I'm not interested in. Thanks for the offer though (and you may wanna check into more of your Pokemon, since some of your other gen 6 legends, like Zapdos and Deoxys, were definitely hacked. Just so it doesn't come back to bite you trading with others :/ )
So I saw your post in the Item Trade thread. I just obtained my fourth badge in Pokemon X and I'd really like a Charizardite Y for my Charizard. I can obtain a Tyranitarite as soon as I beat the game. Can I get the Charizardite Y now and send you the Tyranitarite when I get it? I can send you my Charizardite X to hold onto/have until I fulfill my end of the deal, you know,sorta like an IOU.