It's that simple.
Hearing Natsuhiko's answer, Darkrai couldn't help but lift the corners of its mouth.
Come to think of it.
Actually, Natsuhiko and Darkrai do have some similarities.
Both believe that their existence represents "evil."
They approach and consider things from their own perspective, regardless of whether it's Darkrai appearing accompanied by nightmares or Natsuhiko always considering matters from a "profit-over-everything" standpoint.
However, some choices they make differ from what they perceive themselves to be.
"I can feel it!"
Darkrai suddenly said.
At this moment.
They had already left the planet's boundaries, about to enter the vast universe.
If it weren't for Darkrai's help, Natsuhiko felt he couldn't survive in such an environment for more than ten seconds.
And when they stepped into this area, they finally saw Rayquaza again.
But what they saw was Rayquaza actually battling another Pokémon in space!
Although Rayquaza was dominant, its opponent had unique abilities, able to change forms freely, making it quite challenging to take down.
"Deoxys!"
Natsuhiko's heart sank slightly.
No wonder there was no trace of Rayquaza after it left; it went to space first to battle Deoxys.
Seeing the large and small meteorite fragments floating around their battle.
One could roughly deduce.
It was probably that a meteorite, where Deoxys lived, approached Rayquaza's territory, and Rayquaza perceived it as a taunt, then attacked to shatter the meteorite.
But this angered Deoxys living inside the meteorite.
So, the two Pokémon battled intensely.
For the time being, neither could gain an upper hand, preventing Rayquaza from intervening to quell the battle between Kyogre and Groudon.
After all.
To Rayquaza, Deoxys was invading its territory, while Kyogre and Groudon were merely fighting on the ground, unable to affect it.
To it, clearly, the invader Deoxys was of more concern.
"Of all times, everything decided to pile up now."
Natsuhiko knew Rayquaza and Deoxys's disputes were unending, having appeared in the original story more than once regarding their battles.
It can't be said that just because it's portrayed so, it's the only battle between Rayquaza and Deoxys.
After all, there's not just one Deoxys.
Perhaps, in many unknown situations, Rayquaza had intercepted countless meteorites and Deoxys almost entering the Pokémon Realm.
But how long will this fight continue?
Natsuhiko noticed Deoxys's eyes constantly flickering and couldn't help but ask Darkrai, "Is it saying something?"
"Seems like... it received a signal from its companion, right in... some corner below." Darkrai said intermittently.
"A companion's signal?"
Did a Deoxys already land in the Pokémon Realm?
"This can't go on."
A decision must be made.
This choice isn't difficult.
Natsuhiko still understands the priority of things.
"Do you have a way to put it to sleep?"
Deoxys, after all, is a Psychic Type Pokémon, whereas Darkrai is Dark Type, providing an attribute advantage.
Although for Divine Beasts and Phantom Beasts, attribute suppression doesn't affect them much, there's still a slight effect.
Besides, Dark Type against Psychic Type isn't just about suppression.
Put it to sleep?
Saying that....
"No guarantee, but I can try."
Then, they saw.
Darkrai spread its arms, continuously expanding a massive black hole in front of it.
Then.
Dark energy balls shot out one after another, transforming into new black holes.
Dark Cave!
Deoxys, engaged in battle with Rayquaza, hadn't noticed the arrival of Darkrai and Natsuhiko.
The suppression of psychic sensing by Dark Energy played a certain role as well.
When the already fatigued Deoxys noticed the impending danger and switched to Speed Form, it was still a bit too late.
To ensure success, Darkrai specifically increased the quantity of "Dark Cave."
One of them directly hit Deoxys.
Its consciousness became somewhat muddled; although it didn't fall asleep, its movements became noticeably slower.
Rayquaza halted its actions, looking expressionlessly at Natsuhiko and Darkrai.
In its mind, Natsuhiko's voice echoed.
"Rayquaza, Groudon below says all you can do is fly, and dares you to come to the ground to fight it if you're capable."
Groudon: ???
Having already battled Rayquaza for a long time, Deoxys was utterly exhausted.
Lethargy combined with fatigue struck simultaneously, causing its eyes to begin drooping.
Another "Dark Cave" enveloped it.
The effect of two "Dark Caves" finally made Deoxys unable to resist sleepiness, its eyes slowly closing.
But just before they fully closed, its gaze fell unmistakably on Natsuhiko and Darkrai not far away.
"It seems... it's got its eyes on you." Natsuhiko murmured.
"No, it's on us." Darkrai emphasized.
Natsuhiko: "..."
"But this time, it's enough for it to sleep for a long time. Even if it wakes up and wants to enter the Pokémon Realm again, it will still have to ask for Rayquaza's approval." Darkrai reassured.
Natsuhiko opened his mouth.
In the end, he left a message for Deoxys through telepathy.
"Deoxys, I'll help you find your companion. You rest well here..."
It's unclear if Deoxys heard it.
Anyway, Deoxys, who was struggling to open its eyes while lying on the meteorite, slowly stopped struggling, leaned against the rock, and fell into a deep sleep.