I was watching various Zelda and Pokémon theory videos, and I... have a little bit of a thing. A theory, I mean.
The general gist of it is that Arceus is an Ultra Beast, came from Ultra Space, and created Solgaleo and Lunala. (And by extension Cosmog and Cosmoem.) This also has relations to Type: Null and Silvally, as well as the Aether Foundation and Necrozma.
PART ONE: Ultra Space
Arceus is the creator of the Pokémon universe, for the uninitiated. The following are all of its Pokédex entries from Generation IV to Generation VI:
Diamond: It is described in mythology as the Pokémon that shaped the universe with its 1,000 arms.
Pearl, Y, and Alpha Sapphire: It is told in mythology that this Pokémon was born before the universe even existed.
Platinum, Black and White, and Black 2 and White 2: It is said to have emerged from an egg in a place where there was nothing, then shaped the world.
Heart Gold and Soul Silver, X, and Omega Ruby: According to the legends of Sinnoh, this Pokémon emerged from an egg and shaped all there is in this world.
Three (3) out of four (4) of these entries describe how it existed in a space of nothing before creating this world, some even going so far as to state that it came from an egg of sorts.
However, it might be apparent to everyone that eggs in the Pokémon universe don’t just pop out of nowhere. (Not that the Daycare/Nursery hands will tell you otherwise, but I don’t think they’d want the responsibility of explaining reproduction to some random tween/teen they just met.) It requires at least two Pokémon in the same egg group, or a Ditto and another Pokémon. Where am I going with this, you’re probably asking?
My conclusion: there are more of Arceus’ species in Ultra Space, and they are in their own egg group. The only reason Arceus is put in the Undiscovered Egg Group is because there is only one in this world and thus it cannot breed to create more. Ditto cannot replicate the biology of Arceus because of its origin in Ultra Space, and Ultra Space genetics being even more complicated than that of the Pokémon universe or even the one we reside it, which also explains why Ditto cannot breed with other Ultra Beasts.
A point you may be eager to dispute is that, in its Pokédex entries, Arceus’ egg is stated to have been born in “emptiness.” Ultra Space, of what little we see of it in Sun and Moon, is shown to be pretty empty, with the only other thing there being the Ultra Beasts. Another point to be made is that it’s described as Ultra Space, with “space” being the word that we humans use to describe both the void in between planets as well as the universe beyond Earth’s atmosphere. So, “emptiness” would be a fitting descriptor of Ultra Space.
PART TWO: Cosmog, Cosmoem, Solgaleo, and Lunala (And Necrozma’s Here, Too)
Arceus has been shown to create beings that rule over and regulate the things it creates, like Dialga, Palkia, and Giratina, as well as Azelf, Mesprit, and Uxie. Dialga rules and regulates time, Palkia rules and regulates space, and Giratina rules and regulates matter and antimatter. Azelf embodies willpower, Mesprit embodies emotions, and Uxie embodies knowledge. Arceus created these things to give order to the other Pokémon it created, including humans. So, what’s to say Solgaleo, the embodiment of the sun, and Lunala, the embodiment of the moon, weren’t created by Arceus as well? (And maybe even Necrozma, who seems to embody light, despite its black coloring.)
Well, let’s look at all their designs.
Solgaleo is quadrupedal and white, with golden accents, just like Arceus. It also has a white underbelly, again like Arceus, and a golden crown-like structure around its face and protruding from its main. The golden crown is similar to the structure around Arceus’ midsection.
Lunala is winged and actually has no legs, and is primarily indigo in color, but does still resemble Arceus. However, it does have bony white accents making up its main body and golden structures on the edges of its winds and tail. These golden structures also resemble Arceus’ hoop... thing.
With these similarities, and the fact that Arceus is more dissimilar to Lunala, it can be assumed that Arceus did, in fact, create them, but at least not at the same time. Arceus must have created Solgaleo first, making a commanding son who was the spitting image of itself. Then, Arceus created Lunala, an equally as commanding daughter who looked like itself, but not so much like itself. This order of creation mirrors how the Sun and the Moon in our world came into being: the Sun is simply a star, and formed like one. Then, the Earth and the Moon came. Nobody is exactly sure how the Moon got there, but it definitely was created after the Sun.
However, these Pokémon both started out as mere Cosmog, little embodiments of stardust and nebulae. After all, its entry in Sun states, “its body is gaseous and frail. It slowly grows as it collects dust from the atmosphere.”
Then, they evolved into Cosmoem, which represents the process of all the starstuff coming together, and this is evident in Cosmoem’s weight, which is 2204.4 lbs./999.9 kg. Its Sun entry also supports this, stating, “motionless as if dead, its body is faintly warm to the touch. In the distant past, it was called the cocoon of the stars.”
Then, it all expands into the Sun or the Moon, being Solgaleo or Lunala. This process is a mirror of how celestial bodies are actually created.
Another connection the Cosmog line has to Arceus and Ultra Space is their Pokédex entries making multiple references to other worlds:
Cosmog, in Moon: In ages past, it was called the child of the stars. It's said to be a Pokémon from another world, but no specific details are known.
Cosmoem, also in Moon: There's something accumulating around the black core within its hard shell. People think this Pokémon may come from another world.
Solgaleo:
Sun: It is said to live in another world. The intense light it radiates from the surface of its body can make the darkest of nights light up like midday.
Moon: This Pokémon is said to be a male evolution of Cosmog. At the activation of its third eye, it departs for another world.
Lunala:
Sun: It is said to be a female evolution of Cosmog. When its third eye activates, away it flies to another world.
Moon: Said to live in another world, this Pokémon devours light, drawing the moonless dark veil of night over the brightness of day.
The only alternate worlds we know of in Pokémon, besides the one that the Mystery Dungeon games take place in, is Ultra Space. (And the Distortion World, but the Distortion World most likely resides in or is a part of Ultra Space. It’s a place beyond our dimension where the rules of our world don’t apply, after all.) So, using the powers of extrapolation, we can infer that the Cosmog line is from Ultra Space. Since Arceus is from Ultra Space, as stated earlier, and Arceus is know to create beings in that space to accommodate the Pokémon world, this makes sense.
Now, let’s take another thing I said and prove it: that Necrozma is the embodiment of light, and was also created by Arceus.
Actaully, it being the embodiment of light is pretty much canon. How? Well, it’s the Prism Pokémon with ability Prism Armor and the Move Prismatic Laser. Prisms are associated with light and their ability to split it into many colors. As well, its Moon entry says, “light is apparently the source of its energy. It has an extraordinarily vicious disposition and is constantly firing off laser beams.” It’s safe to say that Necrozma rules over light.
As for its connection to Arceus, Ultra Space, and the Cosmog line, its Sun entry says, “reminiscent of the Ultra Beasts, this life-form, apparently asleep underground, is thought to have come from another world in ancient times.” So, Necrozma isn’t dissimilar to the other Ultra Beasts (and is even encountered during the Ultra Beast post-game sidequest!), and is said to come from another world. This pretty much confirms that it comes from Ultra Space.
Another thing: Arceus most likely created it before Solgaleo and Lunala. Why? Because you can’t have a shining sun and radiant moon without light being there in the first place. Necrozma is like their big nonbinary sibling, basically. The reason it doesn’t look similar to Arceus is because Arceus is god and it can do whatever it wants.
In short: Arceus created the Cosmog line and Necrozma, and they’re ALSO from Ultra Space.
PART THREE: Type: Null, Silvally, the Aether Foundation, and... the Beast Balls?
Type: Null and Silvally are made to replicate Arceus. I know that, you know that, it’s basically canon. Silvally’s ability is called RKS System and is near identical to Multitype, and its shiny turns it yellow just like Arceus’ does, for Mew’s sake!
But... why?
It’s possible that the Aether Foundation knew of Solgaleo and Lunala’s status as Ultra Beasts and as being created by Arceus. Thus, they created it in order to contain them (Solgaleo and Lunala) and other Ultra Beasts. They might’ve hoped that its Arceus-like appearance, moves, and ability would remind all the Ultra Beasts of Arceus, thus making it easier to capture them. Type: Null and Silvally are also very powerful, the latter’s stats comparable to a Pseudo-Legendary’s.
And now for the Beast Balls, because I’m getting tired and this section is the shortest on its own:
The Beast Balls share similar design elements to the Cosmog Line, being blue with golden claw-like accents, and with Arceus, again with the accents. This would make sense, since they’re all Ultra Beasts.
Aaaaaand since I feel as though I’ve covered everything I wanted to, and that I’m tired, that will be all.
