From Bulbapedia, the community-driven Pokémon encyclopedia.
This is a list of Pokémon obtainable from events found in the Generation V Pokémon games. These specific instances of Pokémon can only be obtained once per game; however, some may also be obtained in other ways as well. In addition, some Pokémon, such as Musharna, regenerate and can be encountered on a weekly basis.
Professor Juniper gives the player, Bianca, and Cheren a starter Pokémon.
After defeating Ghetsis and viewing the credits, the player can access Marvelous Bridge. At the west end of the bridge is a salesman who will offer a Magikarp to the player for 500. Unlike in previous games, Magikarp cannot be found anywhere in Unova without the use of Poké Transfer, making it worth the investment. This Pokémon is guaranteed an IV of 31 in Speed.
If the player has a Liberty Pass, they can take a ferry from Castelia City to Liberty Garden. After defeating the Team Plasma Grunts occupying the island, the player can meet Victini inside the statue in the center.
In the Dreamyard, there is a girl near the entrance of the ruins that will give the player one of the three Elemental monkeys; Pansage, Pansear, or Panpour. The monkey the player receives is weak against the player's starter Pokémon, and at the same time, strong against the monkey owned by the Gym Leader of Striaton City.
If the player chose Tepig:
If the player chose Oshawott:
If the player chose Snivy:
After defeating Ghetsis and viewing the credits, the path to the basement of the Dreamyard will be cleared. Every Friday, a Musharna will spawn at the back end of the building. This particular Musharna has its Hidden Ability, Telepathy.
In the Desert Resort, near the entrance to the Relic Castle, the player will find five strange statues which are actually Darmanitan in their Zen Mode. If the player uses a RageCandyBar on them, they can be awoken, and will have the Zen Mode Ability.
If the player transfers an event Celebi from a Generation IV game to Black or White via the Relocator or Poké Transfer and takes it to the Game Freak building, they will find a male Zorua that will join the party if player has any kind of Poké Ball to spare.
If the player transfers an event Shiny beast from a Generation IV game to Black or White via the Relocator or Poké Transfer and takes it to the Lostlorn Forest, a woman will emerge from a trailer, let out a howl, transform into another one of the legendary beasts, and attack. This Pokémon is actually a female Zoroark.
At the far end of Route 18 is a rest house. Inside the rest house is a Pokémon Ranger who will give the player a Larvesta Egg. This is the only Pokémon Egg given as a gift in Black and White.
After defeating Ghetsis and viewing the credits, the way to the deepest parts of the Relic Castle will be unveiled. After the player finds Ryoku of the Seven Sages, they can continue to Volcarona's shrine and battle it.
At the climax of Pokémon Black, inside N's Castle, Reshiram will appear in front of the player and challenge them. The player must capture it to proceed to the final confrontation with N. The only exception occurs if the player has a full party, and a completely filled Storage System (a total of 726 individual Pokémon). In this case, Reshiram will reappear at the peak of Dragonspiral Tower after defeating N and Ghetsis.
At the climax of Pokémon White, inside N's Castle, Zekrom will appear in front of the player and challenge them. The player must capture it to proceed to the final confrontation with N. The only exception occurs if the player has a full party, and a completely filled Storage System (a total of 726 individual Pokémon). In this case, Zekrom will reappear at the peak of Dragonspiral Tower after defeating N and Ghetsis.
Cobalion, Terrakion, and Virizion of the Swords of Justice become available for capture after the player obtains HM03 (Surf) from Alder at the foot of Twist Mountain.
Cobalion dwells within the depths of Mistralton Cave, within the Guidance Chamber. As the leader of the musketeers, the player must capture it before challenging Terrakion and Virizion.
After capturing Cobalion, the Trial Chamber inside Victory Road will be unsealed, allowing the player to challenge Terrakion.
After capturing Cobalion, the Rumination Field within Pinwheel Forest will be unsealed, allowing the player to challenge Virizion.
After the player has earned the Legend Badge and spoken with the clerk in the Route 10 gate, a big storm will spawn on Route 7. Going to the second house on the route during the storm will cause a lady to come out and invite the player into her house. She will then start talking about a Pokémon that causes great storms named Tornadus or Thundurus in Pokémon Black or White, respectively. Upon exiting the house, the Pokémon will confront the player. It will then roam around Unova.
After defeating Ghetsis and gaining access to eastern Unova, the player can access the Abundant Shrine, where Landorus makes his home. However, in order to challenge him, the player must have both Tornadus and Thundurus in their party, which requires the use of trading or certain events.
After defeating Ghetsis and gaining access to eastern Unova, the player can access the Giant Chasm, where Kyurem waits in the deepest chamber, past Crater Forest.
Bianca gives the player a starter Pokémon.
In the final room of the Strange House, the player will find a Lunar Wing that the ghost who inhabits the house intended to bring to Marvelous Bridge. As the player travels the Marvelous Bridge later in the game, the player will be prompted to hold the wing up high. Doing so will summon Cresselia.
This Crustle inside Seaside Cave blocks the way to where Team Plasma has docked the Plasma Frigate. The player can wake it up with Colress's Colress Machine. The energized Crustle will attack the player.
At the Weather Institute on Route 6, the player can receive a Deerling with its Hidden Ability, Serene Grace.
Amanita gives the player an Eevee with its Hidden Ability, Anticipation, in her new research facility in Castelia City after defeating Iris. This Eevee is always male.
In the gate connecting Nacrene City and Route 3 a Pokémon Breeder will give the player a Happiny Egg.
After the player has seen every Pokémon of the Unova Pokédex, they will receive a Permit from Professor Juniper, which will grant access to the Nature Preserve by plane from Mistralton City. Within the sanctuary is a Shiny Haxorus.
On one of the cliffs on Route 18, the player can find a Magma Stone. The Magma Stone summons Heatran, who can be found in the central room inside Reversal Mountain.
This Jellicent has its Hidden Ability, Damp. Its gender and the day of the week it appears vary depending on the version being played. The male Jellicent appears Mondays in Black 2 and the female appears Thursdays in White 2.
Braviary and Mandibuzz
On Route 4 a MandibuzzB2 or BraviaryW2 will appear on Thursdays or Mondays, respectively. They have their Hidden Abilities.
The salesman remains at Marvelous Bridge, with the same asking price of 500 for a Magikarp. However, unlike the last games, wild Magikarp can be found at the Nature Preserve, making this Magikarp less valuable.
After helping a group of original Team Plasma members, the former Sage Rood will reward the player by allowing them to look after a Zorua N had befriended in the past. The Zorua identifies as one of N's Pokémon, and therefore has N's ID and OT.
Like in the previous games, a wild Volcarona can be found on the bottom floor of Relic Castle. However, the old path to the room has been submerged in sand; the player instead can access the bottom floor via Relic Passage. If Volcarona is defeated, it will respawn at a higher level after defeating Champion Iris.
Upon entering the Dreamyard, LatiosB2 or LatiasW2 see the player and flee. After chasing it for a while, it will engage in battle with the player. After being caught or defeated, it will drop the Soul Dew.
After encountering Uxie, Mesprit and Azelf at Cave of Being they scatter throughout Unova. Upon arriving at their given locations, the game will ask the player if they want to examine further. Doing so will summon the guardian to battle.
Uxie, the being of knowledge, is found in front of the Nacrene Museum.
Mesprit, the being of emotion, is found on the roof of Celestial Tower.
Azelf, the being of willpower, is found at Route 23, near the boulder maze.
Regirock, Regice, and Registeel are found in the Underground Ruins; however, which one appear is based on what "Mystery Door" key the player is currently using. Regigigas is found in Twist Mountain and, like with Snowpoint Temple, the player needs the other three Regis.
Regirock is unlocked by default in both versions.
Regice's key is called "Iceberg Key". It is unlocked in White 2 after capturing Regirock. The White 2 player can then distribute this key to Black 2 players.
Registeel's key is called "Iron Key". It is unlocked in Black 2 after capturing Regirock. The Black 2 player can then distribute this key to White 2 players.
Cobalion, Terrakion, and Virizion of the Swords of Justice lose their homes during the events of Black 2 and White 2, and can be seen wandering Route 13, Route 23, and Route 11, respectively. If one of them is defeated, that Pokémon will respawn at a higher level after defeating Champion Iris.
After defeating Champion Iris, the player can encounter N in the ruins of his castle. After defeating him and his ReshiramW2 or ZekromB2, the dragon will transform back into the Light Stone or Dark Stone respectively, which N will then give to the player. Taking the stone to the top of Dragonspiral Tower will allow the player to capture either Reshiram or Zekrom.
During the climax of Pokémon Black 2 and White 2, inside the Giant Chasm, Ghetsis forces N's dragon to fuse with Kyurem, and uses it against the player. It is not capturable in this state. However, once the player recaptures the dragon N relinquished, Kyurem will reappear in its natural form.
After defeating Benga, he goes to his grandfather's house in Floccesy Town. If the player talks to him, he'll give the player a Shiny Dragon-type Pokémon: either a Gible in Pokémon Black 2, or a Dratini in Pokémon White 2.