Will you see N again ?

Question

When you beat N in his Castle in BW 2, he says that he's going to find the trainer who beat him 2 years ago.After that scene, does he shows up again ?

Answer 1

Yes.You can see him again.Long after this, after visiting him at the Ferris Wheel in Nimbasa on Fridays, you will be able to rechallenge N as he wonders about the previous game's Trainer and if he achieved his dream. The team N uses changes on subsequent rebattles and all focuses on a different type of weather and are based on the season. Spring he uses his Water-type team, Summer his Fire-type team, Autumn his Sandstorm-team and Winter his Ice-type team. The battles are incredibly tough, and the weather is set up instantly using the lead Pokémon's ability. He can be rebattled once a season

Source

Answer 2

Yes.
He flees to another reigon in search of a strong trainer.
http://bulbapedia.bulbagarden.net/wiki/N
Pokémon depending on the season.

After catching or knocking out Zekrom B2 /Reshiram W2 , N arrives to:
> congratulate the player and informs that Kyurem has returned to the
> Giant Chasm. From then on, N will appearin Nimbasa City near the
> Rondez-View Ferris Wheel on Fridays. After riding with him and having
> caught or knocked out Kyurem, he returns to the ruins of his castle,
> which now form part of VictoryRoad, for a rematch with different
> Pokémon depending on the season. Spring Water. Summer Fire.

The battles are hard and he sets up his weather instantly using his lead Pokemon.
___
Leads:

Autumn: Hippowdon
Spring: Poelitoad
Summer: Ninetales
Winter: Abomasnow

Answer 3

On fridays if you nock out N, Wait another season then go to the ferris wheel then once youve talked to N go to his castle To where you saw Reshiram and he is there with a different team depending on the season.