is it possible to have Megastones from ORAS to XY

[Raleiigh]

is it possible to have Megastones from ORAS to XY

i tried to put salamencite on my bagon and it crashed or i just did it wrong

[supercarotte]

It is possible to inject mons holding ORAS megastones in XY, but the "item held" field then appears blank (instead of "(no item)").

Using this pokemon in battle/trading or trying to put it in daycare softlocks the game. Also, taking the item back to your bag corrupts your savefile.

So basically no, XY doesn't support ORAS-exclusive items/moves (keep in mind that XY were not updated fo ROSA, it's like trying to trade your xerneas to a diamond version)