>>58310703No, Zinnia says that the Ultimate Weapon is powered by the same energy as Mega Evolution, which is the life energy of Pokémon. She never says that's where Mega Evolution comes from.
What we know is that the first pokemon to Mega Evolve was Rayquaza, which he did in response to the prayers of the Draconids, and that Ray has an organ which extracts energy from the meteors he eats that allow him to Mega Evolve (essentially, he has a Mega Stone inside).
