[Crossover] Pokemon Battles in the Battle Frontier, Starting in Another World

#Help! The Arceus from my world and the consciousness of a world from another universe teamed up and tossed me into yet another world. What do I do?

Shiratori Nao landed on her backside in the grass of an unfamiliar world and fell into deep thought.

Just then, a red Rotom Phone floated over in front of her.

"Beep! A new Pokédex entry for the Battle Frontier in another world has been added to Shiratori Nao's Pokédex! Roto!"

The next second, Shiratori Nao sat bolt upright, though she was on the verge of death. "I totally can!!!"

_

The consciousness of a neighboring world sought out Arceus, the creator god. Seeing how battered and broken that world's consciousness was, Arceus weighed the pros and cons and reluctantly agreed to its request.

But for the sake of its own person's safety in another world, Arceus demanded all sorts of conveniences from that world on Shiratori Nao's behalf.

Such as a door that could open to her home world at any time.

And a dedicated System customer-service representative just for Shiratori Nao, among other things.

_

In Tokyo, Shiratori Nao stared in silence at the oddly shaped 'Pokemon' writhing wildly on the ground in front of her.

Just as the System began to tremble, thinking its lie was about to be exposed, Shiratori Nao excitedly pulled out a Poké Ball.

"As expected of another world. Even the Pokemon are so distinctive."

_

[Mahito, a transforming Pokemon, Dark- and Ghost-type. It can change its form and has a sinister, vicious personality. Legend has it that it was born from the hatred and fear between humans. It can touch an individual's soul and reshape it...]

When Shiratori Nao encountered a 'humanoid Pokemon' at the movie theater, her eyes lit up as the Rotom Phone read out its entry. She immediately threw a Quick Ball at it.

Mahito, hit head-on by the Quick Ball: "?"

_

When a case broke out in Beika, Shiratori Nao looked at the spirit her own Gengar had eaten halfway and cried in alarm, "Don't eat random stuff!!!"

_

Shiratori Nao stared thoughtfully at the pink-haired high school boy she'd just met.

She had just keenly sensed the presence of a 'Pokemon' on this friend of hers using Aura.

Then...

Shiratori Nao held a Quick Ball, itching to try it out on the pink-haired high school boy in front of her.

Pink-haired high school boy: "?"

_

"What is that?! That move is so cool!"

Watching a Special Grade Cursed Spirit unfold its Domain, changing the entire battlefield's appearance single-handedly, Shiratori Nao's eyes shone.

What?! Only a Domain can counter a Domain?

Great! I've decided on you!

"Mr. Rime! Use Mimic!"

"Smeargle! Use Sketch!"

_

"Even in another world, I'm going to become the world's greatest Pokémon Master!"

Watching one new Pokédex entry after another light up, Shiratori Nao let out a satisfied sigh.

Wonderful other world, I'll come again next time!

Arceus, if you have another job like this, I'm in!

-

Updates whenever inspiration strikes, with no set schedule.

A bright, cheerful, sunshine-like heroine, doted on by everyone and with a puppy-like personality.

The heroine comes from a child-oriented world, where there are no schemes or backstabbing! None!!!

I'll save as many characters from their doomed fates as I can! As many as possible!

There will be lots of original worldbuilding for Pokemon, since the games and anime aren't connected.

As for the heroine's background, she's probably a Pokémon Trainer who has traveled for seven years and experienced all sorts of adventures! I especially love some of the settings in Pokémon Violet and Pokémon Legends: Arceus, so I also used the game's main-story adventures when designing her character!! So... (blinks rapidly)

One last note! The timeline is a mess. This is pure imagination, so don't overthink it~

Sorry for any out-of-character moments!

Theme: No matter where I am, I'm going to be the world's greatest Pokémon Master!