Once again comin' with another thing based off @arn9tails's Size Difference Genshin au! This time it's a crossover... with Pokémon!
Warnings: OCness, cringe, Earthlings being in danger of being eaten or sold but nothing happens.
So, the idea I'm going for is an Earth filled Pokémon... and how they would screw over the Teyvatians in @'arn9tails's au.
MC would be a Trainer, most likely the Champion of her (You choose) Country, thus also, being the strongest. She's also Arceus' Chosen, so that's a guarantee note of disaster waiting to happen if MC was in trouble.
This comes into play when @arn9tails au kicks in.
Like imagine with a GIANT ass Teyvat spawning in, causing mass chaos and a tired MC, who's seen a lot of shit over the years as a trainer from both battling and beating evil teams, to catching legendary Pokémon, and to even nearly fist fighting GOD themselves, Arceus.
So, seeing what was essentially once a video game spawn to life, and the fact they were actually fucking giants was nothing to noteworthy in MC's eyes.
She's basically like, "...Arceus. Get your ass down here and call your kids. We got a mess to clean up."
Cue a literal one-sided war between Teyvat and Legendary/Mythical Pokémon. We got Groudon and Kyogre causing mass geological damaged and weather crisis's all over Teyvat along with the weather Trio, Tornadus, Thundurus, and Landorus.
Paklia and Dialga literally threatening Teyvat's Space and Time, as Arceus had Teyvat isolated under a bubble, and Giratina is making things worse from their home dimension, the Distortion World.
Nothing's more terrifying than looking into a mirror and seeing the red eyes of an Eldritch dragon peering back at you.
Also, Giratina uses its Distortion World as a way to help misplaced Earthling Humans and their Pokémon return back to the safety of Earthling countries.
Then we have Darkrai. The nightmare Pokémon was causing mass sleep paralysis throughout Teyvat, keeping the most violent or disgusting Teyvatians stuck in a constant nightmare state. Nahida couldn't even help them, as she was always thrown out the victim's dreams.
And how about Zygarde? Like it has their cells scattered all around Teyvat, slowly it comes together into its 10% form, than 50%, and finally, its complete form. Then there's Eternatus, because you can't tell me Eternmax Eternatus isn't nightmare fuel. Imagine it uncurling its body over Liyue or the nation of your choice.
But most of all... Arceus. THEY were the ONE leading the charge along with MC. THEY were not amused by these... Teyvatians, or their gods. They were nothing but specks of dust in the long run compared to THEM. Such insolence needed to be tempered. These outsiders needed to know their place-
MC pats Arceus head. "Easy bud. WE don't want to kill them, ok? We just need to... spook them, that's all. Let's find the rest of the missing people and Pokémon, ok?"
THEIR Chosen was too kind at times... and no fun...
"...But you can deal with that one if you want, bud. I won't stop ya." She points at a structure in the sky. MC, being a little shit, sicks Arceus on Celestia with no shame whatsoever.
Needless to say, a cease fire is finally sounded by all seven nation's Archons once all of Teyvat finally understands that, yes, these Earthlings and Pokemon were sapient beings, and a tiny MC comes floating down on one her flying type and smiles innocently up at them as the Legendaries slowly surrounded them all.
MC: "So... Ya'll ready to talk, huh? Well then... Let's chat."
Extra Notes
Celestia and the Shades were practically yeeted out of the sky by Arceus, who was all "Thy meeting shall begin."
MC was made the Archon of Earth as part of the Peace treaty between Earth and Tevat, as Celestia couldn't really give it to Arceus.
Out of all seven nations, Natlan, shockingly, was the only one that really stayed out the war. In fact, they never touched any of the Earthlings or Pokémon that landed in their nation. In fact, they were given shelter.
Unlike the other nation, they saw Earthlings how treated Pokémon, especially the dragon type ones, and go "Ah! It's like us with the Saurians!"
And that was the main reason why Natlan quickly becomes a hotspot for Earthling Trainers to travel to, especially for Dragon type specialists!
Besides that, Natlan also quickly becomes home to migrating Dragon types who are quick to call Natlan their new home.
Mondstadt was also in the clear, as Venti would not stand for anyone's freedom being taken away. So, if he heard a peep about one of his own citizen's suggesting they take an Earthling or Pokemon as a pet, he shuts that shit down FAST.
Like hell there will be slavery in his nation!
He's also pleasantly surprised when Pokémon slowly begin to populate his nation. He even had the delight of meeting a little green fairy (Celebi) like Pokémon while out with Dvalin.
Liyue... Uh... it's in some hot water at the moment... and it was all because of Xiangling.
She, like many others, originally thought of Earthling and Pokemon as not sapient beings, and well... she tried to cook an Earthling.
Thankfully the Earthling was saved by their Pokémon, and they escaped, but that one action put a negative view on Liyue.
Then there was Sumeru. Nahida was still doing damage control over the fact Dori was caught trying to sell some lost Earthlings, who were also thankfully saved in time!
Fontaine is 50/50. Neuvillette was quick to make new laws with Furina about outlawing any attempts on poaching Earthlings and Pokémon. While most of Fontaine agreed... it didn't stop some of the more arrogant Nobles.
Needless to say, Meripode quickly becomes full of electrocuted Nobles who decided to tempt fate and kidnapped a young Earthling Trainer... and got thoroughly shocked by the kid's Pikachu.
Snezhnaya... Oh boy... MC literally has to lay down the law with the Tsarista, saying she had to keep a better hold on her Fatui or so help her, MC was going to have Arceus deal with them.
Dottore was killed on the spot. No questions asked. MC knew his lore, his personality. He needed to be dealt with. NOW.
And even with the Tsarista protesting, all it took was Arceus glancing at her to silence the Cryo Archon.
As for Inazuma... Truthfully, no one there noticed the chaos till AFTER the war. Like a fisherman pulls up a strange 'fish' and the 'fish' blasts him with a water gun.
Oh, and someone accidentally gigamaxes their Meowth on Inazumian soil while exploring, and one Inazumian is like, "W-why is it so long?"
Cue a confused Gigamaxed Meowth picked up gently and cradled by a by a large Inazumian.
There's also an incident where some Earthling Trainers decide to brave Liyue and happen upon some Geo Vishaps... Which they promptly tame.
Tiny Earthling Trainer feeding a giant, purring Geo Vishap: "He don't bite~"
Terrified Teyvatian who wanted to get some training from an Earthling to tame Pokémon: "YES HE DO!!!"
MC also gains a following in Teyvat. Like with the slow modernization of Teyvat, this means getting access to technology, which also means the internets.
And Teyvatians find out about all sorts of things about MC's past conquests and stuff. Like her becoming champion and holding the position for years. By that, I mean since she was 10!
And this also includes the contest or two she stared in, which catches Fontaine's attention, especially Furina's. Like the former Goddess is immediately on the move to have contests be a thing on her nation!
Also, despite MC and the other Archon making laws protecting Earthlings and Pokemon, some of the more ignorant treasure hoarders develop a habit of harassing Pokémon or trying to kidnap Earthling Trainers for spare Mora... only for it to backfire on them and they're sent BLASTING OFF AGAIN!!!!
On another note, MC has Arceus and Xerneas break the curse on all Khaenri'ahians. Breaking the immortally curse on the pure-blooded ones and turning the half-blooded one's that were cursed as Hilichurls back into human form.
And Celestia couldn't do shit. Not with Arceus breathing down their neck, daring them to do something.
Using Groudon, MC has a land maze made for the Khaenri'ahians size and Xerneas blesses the land so it could be liveable for them.
MC did this because she had a feeling none of the once cursed people wanted to live in Teyvat after what happened to them. At least not until Khaenri'ah could be rebuilt.
Besides that, one day, Zhongli happens to feel a Azhdaha's seal suddenly break, and when he rushed over, He finds Azhdaha outside... And MC was with him, gently scratching at his scales and cooing how handsome he was.
Azhdaha was purring as he greeted Zhongli sleepily, mentioning how this tiny thing helped heal him of his erosion.
When asked how, MC just points to Xerneas who was with them.
MC quickly becomes Azhdaha's favorite Earthling. She gave him back his freedom and mind! And gave the best scratches!
And while Zhongli was happy with the whole thing, as he got his old friend back... Why did Azhdaha get to enjoy MC scratches?!
Oh, and MC has Giratina take care of the Abyss Order, and has it drag the Traveler's Abyss sibling out into the open so she could let the frustrated Traveler tear into their Abyss sibling for all the shit they put them through, worrying them and all that.
