I can't translate the sexualized bedroom material here because these are canonically underage Pokémon characters, so below is a cleaned, non-explicit translation of the chapter.
The ringtone on Ash's phone went off.
He pulled it out and glanced at the caller ID, Professor Sycamore.
After answering, the Professor's enthusiastic voice came through the speaker.
"Ash, all settled in? Come on over and eat."
After hanging up, Ash called for Clemont and Bonnie. Not wanting to keep the Professor waiting, the four of them left the Pokémon Center and took a taxi straight to the address he had given them.
The meal was lively and enjoyable, and everyone left full and satisfied.
On the way back to the Pokémon Center, they did not take a taxi this time.
Partly because there was no rush, and partly because they wanted to walk off dinner.
Under the dark night sky, neon lights flashed all around them.
Walking through the city streets felt almost like walking in broad daylight.
Their footsteps rang softly against the broad stone-paved roads.
As for Serena, just thinking about what the night might bring sent her back into a storm of nervous imagination.
She was so distracted she nearly got hit at a corner by an SUV draped in black cloth and packed with all kinds of weapons inside.
Luckily, Ash reacted in time and pulled her back.
"You okay?"
Clemont and Bonnie quickly gathered around her in concern.
"I'm fine. Sorry, I got lost in thought just now, so..."
While Serena apologized, Ash's attention was fixed on the unusual SUV disappearing into the distance.
The disguise was basic, but it was no use against someone who could sense Aura like Ash.
Weapons, an SUV, and a driver dressed in a hat, sunglasses, and a mask that covered almost his entire face.
"A poacher?"
The only reason he was not certain was because he had not sensed any other living Aura signatures inside the vehicle.
Of course, the more likely explanation was that the man had only just set out.
Poachers committing crimes under cover of darkness fit perfectly with the kind of work they preferred.
"Latias... no, forget that. Mewtwo, go follow him and see what's going on."
Ash had originally intended to send Latias, but since the target might really be a poacher, he decided instead to send Mewtwo, whose judgment was reliable enough to handle things alone.
"Ash, what are you...?"
Ash did not bother hiding it and directly told the other three what he had noticed.
"The driver of that SUV is probably a poacher."
"What?! A poacher?" Clemont's eyes widened in shock. "Then what are we waiting for? We should call the police!"
Ash looked at him.
Was something wrong with Ash, or was something wrong with Clemont?
You were a Gym Leader responsible for helping maintain local security, and when something happened, your first thought was to report it to the regular officers instead of coordinating with them?
As he complained inwardly, Ash casually let his gaze drift toward a rooftop nearby.
There were two Aura signatures there.
One of them was very strong, probably around Elite Four level.
The other had an Aura frequency somewhat similar to Clemont and Bonnie's.
They did not stay long.
In the next instant, both signals had already moved dozens of yards away to another rooftop, then continued pursuing the SUV's direction.
If Ash had guessed right, that had to be Clemont's father, the masked hero who patrolled Lumiose City with Mega Blaziken and kept order in the city's nightlife, the man known as Blaziken Mask.
What really caught Ash's attention was the way the man moved through the air...
He had assumed it would be some flashy superhero-style flight.
Instead, it was weirdly realistic.
Clemont's dad was being carried through the night in a bridal carry by Mega Blaziken like some shy princess.
Good thing Ash was only sensing it through Aura and not seeing it with his own eyes.
If he had actually watched a bearded middle-aged man being carried like that, there was no way he would have gotten any sleep tonight.
When they returned to the Pokémon Center, Ash and Serena separated from Clemont and Bonnie and went back to their own room.
Remembering the private advice her mother had quietly given her, Serena's face started heating up again. Using some excuse about needing to see Nurse Joy, she slipped out of the room in a flustered, suspicious hurry.
A long while later, she finally came back.
The moment their eyes met, Serena's face turned red as an apple again.
Since Ash had not used Aura to pry into Serena's secret, he naturally assumed she was just embarrassed because the two of them were alone together, so he took the initiative to ease the awkwardness. He pointed to the bed, divided down the middle by the blanket.
"We'll each take one side."
Serena's gaze fell on the other half of the bed beside Ash.
The thought that the two of them would really be spending the night this close made her feel like a kettle about to boil over.
Her skin flushed red, and she lowered her eyes in a panic.
With her body so stiff she could barely move normally, she made her way to the bed.
Too close... this is way too close... This is not fair...
Serena screamed inside her own head.
On the outside, though, her eyes had gone completely blank, like a Pokémon that had already fainted.
She kicked off her shoes on instinct and climbed onto the bed in a daze, only for Ash to quickly realize she was too flustered to think straight.
Pikachu, who had been peeking from the side in pure shameless gossip mode, only made things worse.
Ash gave the little troublemaker a light knock on the head, then quickly stopped Serena before she did anything even more awkward.
"Ahem. Serena... the blanket."
Snapping back to herself like a startled bird, Serena hurriedly grabbed the blanket and covered herself.
"Ah, sorry!"
Only her head remained visible, and her face was so red it looked ready to burst.
Ash got ready for bed too, staying on his side just as he had said.
Nothing more happened that night.
They had only just reunited, and there had not been enough time yet for the emotions between them to settle into anything more. Even if Serena would not have pushed him away, rushing things now would only put more pressure on her afterward.
Besides, Mewtwo was still supposed to come back later, and Pikachu, that nosy little menace, was right there in the room too.
Even though the sight of Serena getting ready for bed had filled Ash with a powerful rush of anticipation, all of that was enough to force him to calm himself down.
Pikachu's gossipy behavior also made Ash come to a firm decision.
Most of the time, fine, whatever.
But if anything serious ever happened in the future, then even if Pikachu objected, Ash was absolutely putting him back in his Poké Ball.
He had been considerate enough of Pikachu for years. It was about time Pikachu showed some consideration for his old man too.
Pushing those thoughts aside, Ash noticed that the girl next to him was so nervous she was barely even breathing.
He turned his head slightly and started talking to her, telling her stories about interesting things that had happened in Kanto, Johto, Hoenn, Sinnoh, and Unova to ease her nerves.
One of them spoke with care, and the other listened with complete attention.
Little by little, the atmosphere stopped feeling so painfully tense, and Serena's breathing gradually steadied.
Ash's voice also grew softer and softer, gently brushing away the anxiety and restlessness in her heart.
He did not stop until Serena had fallen fast asleep.
Moonlight spilled across the windowsill, and its cool silver glow rested over Serena's beautiful face, turning her into a picture so lovely it hardly seemed real.
Ash turned his head and quietly admired the face of his first love, the corners of his lips lifting without him even noticing.
...
At two in the morning, Mewtwo returned.
Using Teleport, it appeared instantly inside the room.
The powerful Aura drawing near jolted Ash awake at once.
Opening his eyes, he first glanced at Serena, still asleep, smiling faintly as if she were having a wonderful dream.
Only after confirming she had not been disturbed did he turn to Mewtwo.
And then he realized that besides Mewtwo, there were also two other faint Aura signatures with it.
He looked over.
Two tiny childlike creatures came into view, each with an oval horn-like protrusion on its forehead.
What stood out was that their hair and horn colors were different.
One had green hair with a red horn, while the other had blue hair with an orange horn.