[ORAS] Outline of a pokemon

[MARSxVenom]

Outside of the new megas, legendaries, and riding mega lati@s, this image has been showing up and its a bit of a mystery what pokemon it is. My thought is regigigas, as Hoenn is where the regi's originated. though a lot of people are saying hoopa, which I dont see at all in the picture. The last one that i've seen talked about is diancie, which is a reasonable assumption since mega diancie is a thing for this game., but what do you guys think, do you agree its one of these pokemon, or perhaps a different one, please leave your thoughts below and discuss who you think this mystery pokemon is


Reference images:
Hoopa:
Regigigas:

Diancie:

Mega Diancie: