>>19619911* inside the Mega Stone.
So Ruby/Sapphire Orb is indeed like a Mega Stone, but comes from a different sources, and produces a similar kind of evolution, but again, from a different perspective (since it's a return to an original state and lost energy is contained inside the orb).
Mega Evolution -> energy comes from another Pokémon/source
Ancient Devolution -> energy comes from the same Pokémon who lost it inside the Orb.
