"You're looking for Team Plasma, right? They ran into the amusement park. Come with me. They're not here. Let's ride the Ferris Wheel and see if we can spot them. I love Ferris Wheels. the circular motion... the mechanics... they're like collections of elegant formulas."
Natural Harmonia Gropius (ナチュラル・ハルモニア・グロピウス,Nachuraru Harumonia Guropiusu?) commonly known as N (エヌ,Enu?) is a major antagonist of the Black and White versions. His full real name is never directly revealed in game, but his surname is (as revealed by Ghetsis between the final two battles against them, the name is first discovered written on N's basketball in his playroom) Harmonia. He is the leader (or, as said by Team Plasma members, the king) of Team Plasma.
Prior to the events of the game during his early childhood, he was forced by his
father to grow amongst abused Pokémon, thus growing resentful of humans. N then decided to become the "hero" of a Unova legend, a hero who once along the Legendary Pokémon (Either Zekrom in Black or Reshiram in White) fought many battles against people who stood against his views and successfully managed to unite people's hearts thus creating the Unova region.
Later on, after he has grown to his current age Ghetsis asks him for his help to separate Pokémon from humans, which he agrees to and is crowned King of Team Plasma by Ghetsis.
A certain time after that he's present during Ghetsis's speech about Pokémon and humans in Accumula Town, and when he and his subordinates leave, he talks to the player's Pokémon and asks it about its thoughts. Not given the answer he expects, he decides to battle with his only Pokémon, after which he retreats.
He's later seen in Nacrene City after the player tries to enter the museum. N shows himself and decides to challenge the player with a completely new Pokémon team, however he is unsuccessful and leaves seeking more powerful "friends" to help him.
The third time he is seen is in Nimbasa City in the amusement park, where he invites the player to go with him to the ferris wheel, showing a childish personality for the first time. When the two of them enter the wheel, N reveals his status as the King of Team Plasma, and what his objective is. After descending from the wheel N and the player are interrupted by Plasma Grunts, who are looking for their "lord". N promises them that he will bide time to let them escape and battles the player a third time. However he is once again defeated and claims that he is going have the power of the Legendary Pokémon and challenge the Elite Four. He taunts the player, saying if you want to stop him, to collect all eight gym badges and go to the Pokémon League.
N is later seen in the Chargestone Cave, revealing his personal guard the Shadow Triad, three members of Team Plasma sent by Ghetsis to protect N. They plague the player continuously during his travel in the cave by teleporting and forcing the player to go with them. The player is finally able to challenge N after passing through many Grunts in the cave. N challenges the player with his new team made solely of Pokémon found in the cave. N is defeated once more, while berating Pokémon Battles as they hurt Pokémon. Bianca and Professor Juniper soon show themselves, with the latter being questioned by N about how she can give Pokémon to trainers making them "suffer". The Professor only says that their views are different but equally respectable; N is furious and takes his leave.
He is seen again after the player successfully earns his 6th Badge. He talks to the first party member on your team that is not fainted, and is happy that the players Pokémon like him, although he's sad that good trainers like you will have to release their Pokémon, too.
The next and last time he is ever seen is during the Pokémon League, in which N shows himself along with his
massive Castle awaiting for the player who makes his/her way through some Grunts and six of the Seven Sages. You see him defeating the Champion Alder, and is pleased to see the player make it. He waits up in his throne, at the top of the castle. N will be sitting in his throne and will summon either Reshiram or Zekrom, but before they can battle, the other legendary Pokémon awakens to be faced by the player. After being successfully caught, the player faces N (either with the two Legendaries clashing or not). N will use a new and fully evolved team of six Pokémon. Even then, he is defeated and is soon confronted by Ghetsis, who reveals he is N's father and his true plot to rule the world by using N. After Ghetsis is defeated, Alder asks N if he's realised his mistake, however N doesn't answer. After Cheren and Alder take Ghetsis away, N talks personally with the player and walks to the hole that Reshiram/Zekrom crashed through and he throws the Poké Ball. The game ends with him saying "Farewell". After the credits, depending on which version (Zekrom on Black, Reshiram on White), Zekrom/Reshiram is seen flying in the sky, with N on it's back.
N is mentioned by Looker after all Seven Sages (excluding Ghetsis) are found and arrested. He says that N has been seen with the legendary Pokémon in a distant land.
Pokemon Black 2 and White 2
Two years later, N returns with either Reshiram/Zekrom to stop Ghetsis, his new Team Plasma, and Kyurem from harming the Unova region. He saves the player from Ghetsis (Who tries to kill the player using Kyurem) using Reshiram/Zekrom. But Ghetsis, anticipating N's arrival, uses the DNA Link Pin to fuse Kyurem with either Reshiram/Zekrom to form Black Kyurem/White Kyurem. N begs the player to stop Ghetsis and Black Kyurem/White Kyurem. The player succeeds, Black Kyurem/White Kyurem splits back into Reshiram/Zekrom and Kyurem, and N gets his Reshiram/Zekrom back while Kyurem disappears. Ghetsis, angered that the player folied his plans, challenges him to a Pokemon battle. The player defeates him nontheless. After Ghetsis escapes with the help of his Shadow Triad, N thanks the player for saving Unova, and leaves flying away with Reshiram/Zekrom.
After the player defeats the Elite Four and becomes the Champion, the player's Rival tells him/her about a random Zoroark being seen on Victory Road. The player then follows the Zoroark all the way to N's Castle. The player then meets N once again and follows him around his castle. N challenges the player to a battle with his Reshiram/Zekrom. After the player defeats the Reshiram/Zekrom, it turns back into either the Black Stone/White Stone. N later congratulates the player after he/she successfully captures Reshiram/Zekrom at Dragonspiral Tower. The player can find him back at his castle for rematches. He has a different team every season you battle him.
N seems to talk quickly when you compare the text speeds from him and Cheren.
N's Pokémon in the final battle, excluding Reshiram and Zekrom, are more than likely Pokémon he played with as a child as none can be found in the wild. Proof of this is the fact he had a Zorua as a kid, and had a Zoroark, which is Zorua's evolved form, in the final fight.
He also refers to his last Pokémon as his "last friend", further supporting the theory that his Pokémon are his childhood friends.
However, some counter this theory with the fact that N calls all Pokémon his friends.
Strangely, in the first battle with N, his Purrloin knows the move Assist, which always fails unless another Pokémon is on the team.
Unlike other past villainous organization bosses, N works solely for the benefit of Pokémon, rather than seeking to use them for his own self-centered ends, although Ghetsis seeks to do so.
N made his first anime appeareance in the Black 2 and White 2 animated trailer.