[DanteFalcon]

Are you honestly going to try and tell me that someone found this Gendom, gave it to the museum who promptly put it in this vault and at no point someone wondered "Hey I wonder where the parent pokemon went off to?" Or thought to examine it closely? I doubt its so picture perfect that no one would find a difference. Thus I find two answers

A) The universe is blind and retarded.

B) Someone is covering things up.

I'd prefer to plan for B and be wrong.

Edit: While I'm at it it conveniently woke up during the museum attack and the watchmen intervention. What are the chances? My bet is not very high. Thus it was planned (though I'll be the first to call Xanatos Gambit at that), someone took advantage of the moment (for an unknown reason) or someone fucked up. And they were so secure in their plan that it would either kill everyone or that it would be destroyed instead of captured. There's a -lot- of unexplained factors for that mission.