5
532
Nintendo 3DS Legend
Towns Folk
That is possible, but unlikely. 3DS development kits are not available openly to the public, and it is not easy to acquire one in the first place.Not necessarily. If he modified it on runtime, then, Nintendo won't notice it, unless the change was made during he was connected to Internet.
If he modified the address from the ROM, yes there would have been a risk, and he would had to code an 'event' to get the Mega-Stone.
Also, maybe he used one of the 3DS Development Consoles/Kit...
I am still waiting for the event that distributes the item.