Even among Legendary Pokémon, Reshiram and Zekrom were exceptionally special beings.
Unlike other Legendary Pokémon, who could unleash their full power at any time and had no dependence on humans,
these two divine dragons who pursued truth and ideals could not wield all of their power without heroes they sincerely acknowledged.
In other words... as long as they had heroes who could help them uphold truth and ideals, then even as divine dragons born alongside humanity and later divided, the power they displayed would not be inferior to ancient gods who had existed since time immemorial!
As Blue Flare burned away more than half of Dark Lugia's pitch-black waterspout, Bai Yang's divine dragon shone with light and heat that seemed capable of rivaling the blazing sun. Its pure, sacred body formed the starkest contrast against the rampaging Dark Lugia beneath the black wind and rain shrouding the heavens.
Watching the divine dragon contend evenly with its power, Dark Lugia's expression instantly darkened, its violent gaze turning toward Su Hao behind Articuno.
Dark Lugia could see the transparent thread of contract connecting Su Hao and Reshiram.
So this is it. The True Dragon is your source of confidence. Does that mean that human is the True Hero?
Heh. It seems the Strongest Dragon on the Surface slept itself stupid, actually allowing the True Dragon to leave its body.
Dark Lugia was Lugia's dark side, so it naturally possessed most of Lugia's memories. Things Articuno and the others did not understand were perfectly clear to Dark Lugia.
The Combat Power displayed by a True Dragon that had found its hero and one that had not were on completely different levels. This was becoming slightly troublesome...
However, as its battle with Reshiram unfolded, the Secret Realm would fall toward the main world faster.