It's basically about a girl named Melody who can change into any eeveelution that she wants, her family died in a fire and she's living on her own in the forest, she then finds a letter on the ground and that's when her journey begins (don't want to spoil it).

Idk just pictures I found

Alyssia, also known as the Mega Evolution Master, travels from Kalos to Hoenn, exploring every new place with her team of mega evolving pokemon. At first glance, she looks like an ordinary trainer. But what happens when she bumps into Steven Stone, the Hoenn champion, who shows interest in her? Will she let him join her on her journey? I don't own Pokemon, Alyssia and the story belong to me.

[Continuation in progress. Please stay tuned.] With the rise of MMO's, the latest release of 'Pokémon World Online' is no different from the other MMO's, but this game hides a secret. Once you start playing, you cannot exit the game unless the game has been beaten. There is another way to exit, however. [Disclaimer: I do not own Pokémon or Sword Art Online. All rights go to their respectful owners. Also, I believe that the title of this fanfiction is identical to a fanmade Pokémon MMO, I claim no ownership of said game.]