(adsbygoogle = window.adsbygoogle || []).push({}); Is there any hacks, mods that allow the user to acquire any of the legendarys.

With MITM you can, though they don't stay on your account. It's purely for fun. The only thing you can do is wait for Niantic to release them.

Let me know if this has answered your question.

So they only spoof the Pokemon say a zubat, to a moltres but in reality it's only a zubat
They don't stick ?

Pretty much, yes. The only way to get the legendary pokemon is to literally wait for Niantic to release them. There is no other way, and if you did find a way, Niantic would remove it from your account, like they removed Articuno from people who accidentally caught it.