Team Plasma continues to implement its evil plan to steal the Light Stone and secure N. But Cilan and Iris are battling back hard, while Ash and N are trapped underground. N can sense the disturbance on the surface, as he hears the inner voices of his Pokémon friends screaming in distress. Ash decides they have to get out of there and help, and recalls one of Professor Cedric Juniper’s adventure rules: Never give up until the very end! And as N watches in astonishment, Ash brings out the rest of his Pokémon, and they all work together to dig a tunnel to the surface as N marvels at the bond between them.
Meanwhile, above ground, Colress has again activated his Pokémon control device, forcing Cilan and Iris to return Crustle and Dragonite to their Poké Balls so the machine can’t control them. This leaves our heroes vulnerable, and Team Plasma moves in to capture them! Aldith wants Colress to send the controlled Pokémon underground after their targets—and just at that moment, Krookodile bursts through the ground, followed quickly by Charizard, Ash, and N, holding the Light Stone!
Colress refocuses his device on Ash’s Pokémon, and Ash scrambles to return them all to safety...all except Pikachu, who has a well-known dislike of its own Poké Ball. Colress’s machine takes control, and a growling Pikachu turns to attack our heroes. Ash gently attempts to make his best buddy recognize him, but it’s not working, and Pikachu unleashes a full-power Thunderbolt on Ash at close range, knocking him unconscious.
Desperately, N offers to give himself up—along with the Light Stone—if Colress turns off the device and sets Pikachu free. Colress agrees, N is taken into Team Plasma’s custody, and Pikachu comes back to its senses and sadly cuddles up to the wounded Ash. Ghetsis soon arrives and reveals his ultimate goal: awakening the Legendary Pokémon Reshiram from the Light Stone and taking control of its mind! Can our heroes stop this villainous scheme before it’s too late?