

In the throne room, N recalls the fateful battle two years ago and asks the player to battle him and his Zekrom B2/ Reshiram W2.

Upon entering the castle, N requests that player head to the deepest chamber. Once the player enters the Hall of Fame for the first time, N's Zoroark will stop blocking a cliffside path at Victory Road and will lead the player down to the ruins of N's Castle. After the player defeats the fused dragon, Zekrom B2/ Reshiram W2 is freed and returns to N's side. Kyurem then absorbs the stone and fuses with it to form Black Kyurem B2/White Kyurem W2. Anticipating this, Ghetsis uses the DNA Splicers on Kyurem, enabling it to revert Zekrom B2/ Reshiram W2 back into the Dark Stone B2/ Light Stone W2.

N arrives at the Giant Chasm in response to Kyurem's suffering at the hands of Ghetsis, saving the player from being frozen with Zekrom's B2/ Reshiram's W2 signature move. This revival and battle occur at N's Castle, a structure that emerged from the ground around the Pokémon League. Lenora then gives the Light Stone B/Dark Stone W to the player, who must then revive the Legendary dragon within it and battle N. Professor Juniper and Lenora then realized that the "ordinary stone" displayed in the museum was actually the Light Stone B/Dark Stone W, and request that the player come to Nacrene City immediately via Xtransceiver. Team Plasma also tracked down that the Light Stone B/Dark Stone W should have been located in the Relic Castle and searched it, only to find that it was gone. The Dark Stone B/Light Stone W is revived as Zekrom B/ Reshiram W and called upon by N to create a world where Pokémon and people are separate. The Dark Stone B/Light Stone W resides in Dragonspiral Tower, while the Light Stone B/Dark Stone W once resided in the Relic Castle (which was excavated and put on display in the Nacrene Museum prior to the events of Black and White). Both dragons' bodies were destroyed, and they transformed into the Light Stone and Dark Stone, respectively. However, eventually their sons continued the fight and both the dragons started to battle again, destroying the Unova region with their fire and lightning powers before disappearing. Since they were both born from the same dragon, neither could defeat the other and the brothers declared that there was no right side. However, they could not decide whether to pursue truth or ideals, so the dragon split into Reshiram and Zekrom and each followed one of the brothers.
