Memory Link is a new feature that allows players to sync both the original Black and White with Black 2 and White 2 together via Wi-Fi or DS Wireless Communications. With this feature, the player can access new game features and interactions in Black 2 and White 2. The player may need to finish the main story in their Black or White Version to see some of the flashbacks.
Events
There are many events that take place via Memory Link.
Flashbacks
Certain NPCs will reflect on the past when spoken to after Memory Link has been activated. These memories will explain some of the events that happen in the two year gap that led to the current Unova. Here is a list of the NPCs' flashbacks that occur within the game via Memory Link, how to unlock them and their locations:
Unlocked by: Defeating N and Ghetsis in Black and White
Memory: When you enter Team Plasma's building in Driftveil City a second time, two Team Plasma grunts are shown talking about N. When they leave, N appears.
Unlocked by: Defeating N and Ghetsis in Black and White
Memory: See N inside Chargestone Cave, talking about releasing his Pokemon, separating Pokémon and people, and facing the playercharacter from Black and White.
There are also various NPCs that will mention the player character from Black and White, including said character's mother, Bianca, Cheren, and Professor Juniper.
Player's Room
If the player has achieved certain goals in the original Black and White, such as a certificate for the Pokédex and trophies from the Battle Subway, then they can be transferred to the player's room in Black 2 and White 2 and can be observed from there.
Musical Props
The player may receive the props for the Pokémon Musical that were previously owned by theplayer. The owner will claim that they have dropped it accidentally and will give the player the props if they had not already received a Prop Case. However the case won't be obtainable if the player already received a new one in Black 2 and White 2.
Loblolly's Studio
Items can be brought over to the player's Dream World home from the player's Dream World home from Black and White if the player assists Loblolly picking items for creation which end up in the Dream World in Black and White.
The player may obtain and capture some of N's Pokémon that he previously had during his adventure in the original Black and White, excluding the Pokémon that N had used during the final battle against theplayer in Black and White. To find N's Pokémon, the player must defeat N and Ghetsis in Black and White.
Battles
When Memory Link is used, the player can battle Bianca and Cheren, who have their old team from the original Black and White, depending on who the starter Pokémon was in Black and White. The player must have defeated N and Ghetsis in Black and White in order to have these one time battles.