Grovyle, having grown up in an environment like Nature Domain, possessed a far greater sensitivity and affinity for life energy than any Grass type Pokémon of the same level outside.
On top of that, Grovyle itself was highly talented—it had been among those specially cultivated in Sceptile's clan territory.
The combination of the two was what allowed it to grasp an ability that was out of reach for most Grass type Pokémon before even reaching Elite level.
But Xinhai could not tell them any of this.
It was not because he distrusted Ryosuke Onodera, Yuma Kamiya, and Rika Yuzuki—after spending the past two days with them, he felt that they were all decent people worth befriending.
But the matter of Nature Domain involved too much.
That secret realm created by Celebi, the unique environment inhabited by the Grovyle clan... none of that information could be casually revealed, or it would inevitably bring unnecessary trouble.
Whether for himself, for the safety of Rika Yuzuki and the other two, or for the Pokémon living in Nature Domain, he could not let it slip.
"My Grovyle is rather special." Xinhai smiled, his tone calm and candid, as though he were discussing something entirely ordinary. "Its case is an exception. Ordinary Grass type Pokémon would find it difficult to replicate this."
"I see..." Rika Yuzuki nodded thoughtfully. Although the confusion in her eyes had not completely faded, she did not press any further.
After all, some things involved the core of how a Trainer raised Pokémon and could not possibly be disclosed in full to outsiders.
Besides, Xinhai had already said that his Grovyle was special. With her fairly extensive experience raising Grass type Pokémon, she immediately formed a rough guess and chose not to ask more.
"Don't get too greedy, Rika." Ryosuke Onodera