Frozir said:
I don't see why legendaries in newer regions HAVE to be more powerful than those in the older regions. There isn't really a chain there, because Mew, being in the first gen, is arguably only second to Arceus, as it is the ancestor of pokemon, which mean that every pokemon that aren't directly created by Arceus is slowly evolved from Mew after millions of years.
There's also Deoxys, though it is a powerful alien virus, it does not seem to possess any world-changing power, yet it finds a space right at the end of the Hoenn dex, after the world-shaping Kyogre and Groundon. How would you explain that then?
If there has to be a reason for why Arceus is introduced, I'll have to say it can be because of the mere fact that sinnoh is the first Pokemon region that Arceus has ever created.
There is a power increase of natural-power Legendaries from gen to gen. It's better understood if the trios and pseudo-legends are separated from the big-name legends, the box-art Pokemon who drive each generation. The trios usually get a boost in status, or reputation. It parallels the true Legendaries' actual boosts in power, or hierarchy.
The birds reigned over the elemental powers of fire, ice, and lightning. Then, the dogs/cats (whichever you please) were on an equal footing (except for having come back from the dead via Ho-Oh). Then we get the Regis, ancient golems, like Grecian titans. Better status than the birds again. Then, the Sinnoh trio
gave humans will, knowledge, and emotion. That's the most prestigious so far.
Considering there were no earth-shapers from Kanto (incidentally, a reason for the starters to be the namesakes/box art), Ho-Oh and Lugia naturally started at a higher esteem. They were the controllers/guardians of Pokemon/human wellbeing and the sea/waterflow, respectively. They protected the welfare of the world- kept it running right, if you will. Next came Kyogre, Groudon, and Rayquaza, who actually
formed the sea, earth, and sky, respectively. They reigned over nature. A huge jump in power. Then Dialga, Palkia, and Giratina came, embodying time, space, and the reverse dimension, respectively. We actually get into ruling over the very laws of physics themselves. Another step up.
Next, allow me to clear up the business of Mew. In speaking of Mew, the words 'origin of all Pokemon' may have been used, but that isn't the same as it is with Arceus. Mew is the
ancestor of Pokemon, not the creator. That's why there's a sharp divide between Mew's 'firstness' and Arceus's 'firstness.' Also, strategically, Mew was included in the first gen as a 'secret' to boost interest in the franchise. Historically, Mew needed to be in the first gen in order to explain Mewtwo's backstory all the way. (By the way, I am fully committed to Mew's being the most powerful/prestigious legendary Pokemon of them all, so I don't mean to discredit it!)
Last, yes I can explain Deoxys. Like Mewtwo, Deoxys has a Legendary status unrelated to the world or nature. They are not world-shapers, they are so to speak, inorganic legendary Pokemon. (Yes, Deoxys is probably organically made, but you know what I mean.) As shown like the first gen, the hyper-powerful Legendary comes after the natural ones, ie: Mewtwo after Articuno, Zapdos, and Moltres. Furthermore, Deoxys was something of a secret, like Mew. They
always come after.
