Ash didn't tell anyone about Mewtwo's ability to MEGA evolve; on one hand, he saw no need to boast about it, and on the other, it was a habit to keep a card up his sleeve.
Just like Charizard's MEGA evolution and other hidden strategies during battles, these are good traditions he learned from the experts in the group.
In essence, the fact that Mewtwo can MEGA evolve is truly incredible, as MEGA evolution activates the ancient genes within a Pokemon, allowing it to reach a higher level of evolution akin to an ancestral form.
However, since Mewtwo is an artificial Pokemon, how could it have anything like an ancestral trait? If anything, that would mean becoming Mew, right?
This is why Lorelei and Cynthia were so shocked upon witnessing Mewtwo's MEGA evolution. On one hand, surprised by a Divine Domain-level Pokemon's MEGA evolution, and on the other, amazed that Mewtwo could MEGA evolve at all.
Regardless, this is a good thing for them; the stronger Mewtwo is, the more confidence they have in defeating the two mutated Divine Birds.
They would also have more time to find Lugia and the remaining Divine Bird.
For now, only two Divine Birds stand before Ash. Team Galactic's members, along with Pluton and Mars, have not appeared. Based on what Pluton said moments ago, they seem to have set their sights on the last Divine Bird, Articuno.
Since they managed to alter and control Moltres and Zapdos, they certainly have ways to alter and control Articuno. Mewtwo might have a chance against two Divine Birds, but against all three, the hope of victory would be slim.
And according to Cynthia's investigation, these Three Divine Birds, possessing Divine Positions, are deeply connected to the entire world and nature. If they are controlled and their divine positions disrupted, there will be chaos throughout the land.
The raging storms around Asia Island are the best evidence. While the island has always had severe weather, it has never been this constant.
The natural elements of the world have already become chaotic due to Moltres and Zapdos transforming into the Galar form. If something happens to Articuno, it means all three Divine Position Pokemon have fallen, and the world will descend into chaos.
At that time—Lugia will undoubtedly appear!
This is the ultimate goal of Team Galactic; they intend to use the control of the Three Divine Birds to force Lugia out.
Even without discussing whether they have a method against Lugia, just knowing their plot, Cynthia cannot stay idle. So, even though Ash has the grave responsibility of confronting two of the Three Divine Birds, their mission is equally significant!
"We'll leave the rest to you, Ash!"
"Don't worry!"
Receiving Ash's affirmative response, Cynthia and Lorelei took the lead and ran to the rear. Misty and Serena glanced at Ash wistfully and worriedly before following suit.
They didn't say anything about staying to support Ash because if they stayed, they would only be burdens.
At times like this, the wisest choice is to follow Cynthia and Lorelei to see if there's anything they can help with.
Especially Serena; despite her training with Ash, she still only has a newly evolved Braixen.
In such a high-level battle, even a minor hit could cause severe injury, so she must not stay.
...
With Cynthia and the others leaving, Zapdos and Moltres let out cries in the sky, then charged ahead!
Moltres was wrapped in layers of dark red flames, with an intense aura of anger within the fire, while Zapdos made sounds like thunder, aiming its talons at Mewtwo and descending like a meteor!
'Teleport!' At this moment, Ash and Mewtwo were in perfect sync, and one thought from Ash was enough for Mewtwo to understand.
Although Mewtwo was eager to test its current power, since Ash told her to evade, she decided to follow his command.
The power of thunder and fire surged forward but hit nothing, creating shockwaves that rippled through the air as their moves collided. A wave of Aura from Ash's front formed a barrier, shielding him from the mountain-crumbling aftermath.
On Ash's shoulder, Pikachu watched the actions of the two Legendary Beasts intently, then suddenly spoke up, "Pika Pika!"
"You're saying that the move Zapdos just used wasn't an Electric Type Move? Indeed, while the sound of thunder was heard, there was no trace of thunder energy, and the same goes for Moltres. Although surrounded by flames, it only gives off a deep malice, reminiscent of a Dark Attribute move…"
Ash nodded in agreement with Pikachu's thoughts.
While Ash might possibly sense wrong, Pikachu's ability to sense thunder energy is infallible. If he says there is no thunder energy on Zapdos, then that move was definitely not an Electric Type Move but rather something resembling it from another attribute.