I went into B2W2 as "blind" as possible so I didn't know about N's Pokémon being available. The first Pokémon I ran into in Chargestone Cave was one of them, and the green hexagons, reminiscent of the "shiny sparkle," appeared, which really surprised me. The Pokémon wasn't shiny but I felt I needed to catch it anyways because of that sparkle--and I was super shocked when the game said it already had an OT and couldn't be nicknamed! I had no idea what that could mean, but when I was able to check my box and I saw its OT was N I was super excited. N is my favorite Pokémon character and I thought it was such a great idea to be able to catch his Pokémon.
I didn't use Zoroark in my run of Black, so when I was given N's Zorua in Black 2, I knew I had to use it! And I'm really glad I did, because when you meet with N at some point in the sequels and you have one of his Pokémon in your party, he points it out and thanks them for helping him in the past! Aaah I loved that!!
The fact that each of his Pokémon have 30IVs in each stat is so good, too, really. I was so disappointed that when transferred into gen 6 they don't keep their special sparkle!