Quoted By:
>Pokémon Bank Celebi unlocks a special event
>a rift opens up and a Lucario appears and starts flipping out
>turns out it's the Lucario that was supposedly the first Pokémon to Mega Evolve
>it's freaking out because it was ripped from its home era and dropped in a world that's completely alien to it
>you fight Lucario to calm it down
>turns out that it actually uses Primal Reversion
>after beating Primal Lucario it calms down and joins you
>because of this the Lucario is no longer in the past and thus history is changed
>thus explaining why ORAS says Rayquaza is actually the first Pokémon to Mega Evolve