After telling them my answer, they went nuts. Some were pumped and excited to battle, some were against the idea, saying that there are too many humans, and the others were asking what the Pokémon school was. So it was chaos. Until Satoshi returned his Pokémon. He brought Pikachu, Mewtwo, Jirachi, Tyranitar, Greninja, and the ace of his team, who can sink a whole region in a massive pool of lava,
Charizard.

Mewtwo, Tyranitar, and Charizard can mega evolve, while Greninja can still do the Bond Phenomenon. He packed up his stuff and got Mewtwo to teleport him to the Pokémon school.

After arriving, he was walking to the building, without saying a word. Sure, he got some looks, but he didn't care. Being quiet became a habit after isolating himself from humanity.

Then, he heard some people spreading rumors that he was the trainer from Mt. Lanakila. Which was half true. Honestly, he was the most self-concealed person in the whole Alola region. He never spoke to anyone. But everyone spoke about him. Which was normal.

Anyway, while walking towards the building, he ran into a group of students socializing. 5 of them, to be exact.

(Please note that I'm not very good at this...)

The first person was probably the most socially active. She had long green hair, very green eyes, a Bounsweet on her shoulder, a grey, sleeveless shirt that doubles as a pair of pants with a pocket at the neck. From the looks of it, she is a grass type trainer. The "socially active" part makes Satoshi cringe.

Next, a short and quite fat (no offense) boy with orange hair. A white shirt with a logo that looks like a Gameboy, and a scarf that resembles a Pikachu's tail. Brown pants with orange lining. Brightly colored shoes and a Togedemaru on his head.

Then, a girl with short blue hair and a headband that resembles a fishing net. A white top and blue pants with light blue wave thingies at the bottom. Has a pair of flip-flops. She carries a Popplio, and is a water-type trainer.

The fighter of the group. He has hair that is black and red, and is shaped like a flame. He's very tanned, kinda buff, has shorts that are red and maroon. Did I mention that he's shirtless? Wears like a pair of sandals, but more covered up.

The shy girl. Pale skin, long, light blonde hair. She has a massive hat on for whatever reason. Wearing a white dress with very very light baby blue outlines, and boots with the same color scheme. She was meant to look like UB-01 Symbiont. Apparently has no Pokémon.

Yep. Mallow, Sophocles, Lana, Kiawe, and Lillie.

Satoshi just pretended that he didn't see that and continued to beeline towards the entrance. So, he was looking for two people called Professor Kukui and Samson Oak, or Principal Oak.

(Little Time Skip)

After a while of wandering around, he finally found the place where Professor Kukui and Principal Oak were at. He opened the door. To his luck they were looking right at the door.

"Ah, is this a new kid?" Oak said. Satoshi merely nodded. "Looks like a quiet one." Professor Kukui added.

"Yes" Satoshi said, responding to Oak.
"Ok" Oak said "Let me do the paperwork, then you're in!"