All along, Ash has held a belief that Pokemon are like a blank slate. What color they get painted largely depends on the surrounding environment and the trainer's character. If the trainer isn't a good person, then the Pokemon will also become like the trainer.
But the biggest difference between Pokemon and humans is that their true nature is actually kind and loyal.
Otherwise, why would Pokemon, with such great power, listen to humans who can't even fight off a chicken? Besides humans helping them become stronger, it's also because of the kindness and loyalty inherent in their nature.
Therefore, Ash always believed that he could change Mewtwo!
Change Mewtwo's personality, change Mewtwo's thoughts, allow Mewtwo to break free from Giovanni, break free from Team Rocket's influence, and return to the right path.
But now Ash realizes that speaking kindly with Mewtwo may really be futile. No matter what he says, Mewtwo remains stubbornly committed to its own ideas, unwilling to listen to anyone else. This obstinate personality is something he doesn't know where it was learned from.
Now, even worse, Mewtwo has extended its evil grasp towards other people's Pokemon. The Pokeball that can capture others' Pokemon gives Ash an instant sense of deja vu—it's Team Rocket's technology!
Who else but Team Rocket would invent such a Pokeball to snatch others' Pokemon?
Mewtwo is far too influenced by Team Rocket, and only by completely defeating Mewtwo will he possibly be able to listen to reason.
As anger ignites in Ash's heart, the black Pokeballs on the other side do not stop. Although Pikachu destroyed one black Pokeball using Iron Tail, countless others are waiting.
Pikachu flashes with golden Thunder, zapping all the approaching Pokeballs away, but soon more Pokeballs come charging at Pikachu. Ash's Charizard is also pursued by the black Pokeballs.
While Charizard has recovered some physical strength, its condition is still not great. After burning several Pokeballs to ash, it's still hit by a black Pokeball just as it's about to be captured. An ice-blue beam shoots over, freezing the Pokeball into an ice sculpture.
Charizard thus avoids being forcibly captured.
He follows the direction of the beam and finds that it was released by Lorelei's Dewgong.
Not only Dewgong, but Lorelei is surrounded by Pokemon. She released all six of her Pokemon to deal with the current situation.
Dewgong, Cloyster, Jynx, Lapras, Slowbro, Weavile—these are Lorelei's main six Pokemon!
The Glaceon Ash previously battled wasn't part of Lorelei's main team but just a secondary team.
The lowest level of Lorelei's main Pokemon is Champion level. Though nominally an Elite, she is a true Champion Trainer!
Lorelei feels an indescribable pressure from Mewtwo, even more than Lance gives her.
Though Lance often appears to be at a disadvantage with her, in reality, Lance's Pokemon, in terms of strength, could definitely rank among the top three in the world. It's just that all his skills are vested in his main Dragonite, which has a quadruple Ice weakness, making him easily countered by her.
This is why Lance has never been able to overcome her and become the Kanto Champion. If only Lance's main wasn't Dragonite but purely Dragon Type, perhaps he would already be the Kanto Champion.
And in pure power, Mewtwo exerts more pressure on her than Lance's Dragonite, and Mewtwo isn't affected by Ice Type restraints, so Lorelei disregards the rules and straightforwardly releases all her Pokemon.
Gang up tactics are the way to win this battle!
The black Pokeballs turn into ice sculptures one by one under Lorelei's Pokemon's obstruction. The Pokemon and trainers present have temporarily resolved the crisis.
Ash, who had been preparing to return to help, also feels relieved. Lorelei's strength can be trusted. With Lorelei there, those things won't even come close to Pikachu and the others.
"These Pokeballs of yours are Team Rocket's technology, right? You talk about using Pokemon's power to overthrow human rule while using the power of an evil human organization. Is this your revolution?"
In response to Ash's question, Mewtwo remains indifferent: 'Don't you humans also use Pokemon to dominate Pokemon? Since that's the case, why is it wrong for me to use your human technology to punish humans?'
Ash: …
'Team Rocket indeed isn't good, but the technology they possess far exceeds your imagination. Not only did they create a monster like me, but they also made Pokeballs that can capture others' Pokemon. Beneath this castle, there's even a device that can instantly copy Pokemon.'
'The copied Pokemon have the same combat power and talent as the original. The power you and your proud partners have gained through long training can effortlessly be obtained through copying technology, including that woman's Pokemon over there.'
Lorelei: …
Mewtwo's words make Lorelei's usually cool and charming face incredibly solemn. If what Mewtwo says isn't a lie, then this technology can only be described as terrifying. And if Team Rocket holds such technology, they can undoubtedly trigger a war that would terrify the entire world!