Though Ogerpon's little head couldn't quite grasp terms like "Terastal Energy" and "Terastallization,"
she could hear the certainty and reassurance in Xia Chi's voice.
So Ogerpon stopped panicking over the mask's transformation and settled down to feel the power surging within her.
Driven by Terastal Energy, the Tera Jewel atop the mask suddenly burst into dazzling light.
And at the heart of that light, the small mask that had barely covered Ogerpon's face underwent an astonishing transformation!
Vines grew wildly along its edges, swelling and twisting together like the roots of an ancient tree. Then the mask's outline rapidly expanded as though being inflated.
In the blink of an eye, it dwarfed Ogerpon's petite body, becoming an enormous totem that floated above her head and filled nearly half the space!
(Ogerpon's special Terastallization)
"Poni!"
As though Ogerpon had sensed the strange power Terastallization had granted her, a bright, ringing cry came from beneath the Terastallized mask!
The enormous Teal Mask tipped forward slightly, and the green flames gathered at its gaping mouth erupted with a roar!
At the same time, a shriek rang through the cavern.
The Noivern wreathed in Stellar radiance spread its crystallized wings and plunged toward her!
Ogerpon neither dodged nor retreated. She thrust the enormous Teal Mask above her head forward, then swung the Ivy Cudgel in her hand with all her might!
Bam-
A dull boom, like a giant log slamming into the ground, thundered through the empty cave.
Then the Noivern that had come hurtling down shot into the distance like a baseball struck by a bat, flying away even faster than it had approached!
Behind them, the institute's Noivern, which hadn't returned to its Poké Ball, shuddered violently.
It couldn't help silently mourning this fellow Pokémon it had never met.
*Bro, were you