
This thread is for people that play and are wanting to trade/battle with other people, from what I've read, you can add people and trade/battle, will be getting my DS tomorrow so would be good to have people to do such things with
From another thread i read in this section, the newer black/white isn't so popular so i won't cover it unless its requested.
SPOILER: Pokemon Exclusive to each game
As in Pokémon Gold and Silver, the primary Pokémon of the remakes are native to the Johto and Kanto regions. Due to advances in gameplay since the second generation, the regional Pokédex used in Gold and Silver (the New Pokédex) has been updated to include those Pokémon which evolve upon learning a new move. Rather than simply excluding these evolutions (as Pokémon FireRed and LeafGreen did with happiness-based evolutions), an improved Johto Pokédex was established with 256 Pokémon: five more than the New Pokédex.
Similarly to other recently released Pokémon games, Pokémon from outside the regional Pokédex can be captured after defeating the Elite Four and earning the National Pokédex. Pokémon native to Sinnoh and Hoenn can be found in various methods. Swarms of Pokémon sometimes break out across the Johto and Kanto regions; oftentimes these are not native to either of the regions. Pokémon from other regions can be located by playing one of two special stations on the Pokégear's radio function. There is a channel for Sinnoh Pokémon which plays only on Thursdays; the Hoenn channel only plays on Wednesdays. By having either of these programs turned on when in tall grass the chance of finding a foreign Pokémon increases. The Bug-Catching Contest also hosts, from time to time, Hoenn and Sinnoh Pokémon. They will only appear on Thursdays and Saturdays. The Johto Safari Zone's customization option also allows for the finding of Pokémon from other regions.
In an apparent attempt to remove reliance on Generation III cartridges, starter Pokémon of Kanto and Hoenn can be obtained late in the game from Professor Oak and Steven Stone respectively. Some legendary Pokémon which were not included in the Generation II games, such as Kanto's legendary birds and Mewtwo, are also available.
As in all main series Pokémon games, there are a number of Pokémon which can be found in one of the paired games, but not the other. A list of these Pokémon follows below.
as show in the below image

Story Plot
SPOILER: Click to view
The plot of Pokémon HeartGold and SoulSilver are mostly the same as Gold and Silver with a few changes. The player, either Ethan or Lyra begins his journey from New Bark Town, running an errand for Professor Elm to Mr. Pokémon's house to discover what he was so excited about. Elm supplies the player with one of three Pokémon, Chikorita, Cyndaquil, or Totodile, for this errand. After Mr. Pokémon's discovery turns out to be an egg, the player returns to New Bark Town, only to find that a suspicious red-haired boy seen lurking outside of Elm's lab earlier has stolen one of Elm's Pokémon— the one that the player's choice is weak to, coincidentally. Upon defeating him and returning to New Bark Town, the player gives the name of the boy (the player can choose any name, provided it fits under the seven-character limit; his name defaults to Silver) to a police officer who has come to investigate the incident. Elm is amazed by the egg and insists on studying it, allowing the player to keep the Pokémon they traveled with as a starter Pokémon. From here, he encourages the player to journey across Johto and challenge the eight Gym Leaders, Falkner, Bugsy, Whitney, Morty, Chuck, Jasmine, Pryce, and Clair, and eventually the Pokémon League (though this is a long way off). With the first Gym in nearby Violet City, the player heads off on their adventure.
Upon arriving at Violet City, the player must first defeat the Elder Li at Sprout Tower before facing the Violet City gym. He has just been defeated by Silver and after defeating Li, he gives the player Flash. After defeating Falkner for the Zephyr Badge, Elm's assistant appears to give the player the egg, which will later hatch into a Togepi. Heading south towards Azalea Town by way of Route 32 and Union Cave, the player meets up with the villainous Team Rocket, formed again after it was disbanded three years prior in the neighboring Kanto region by a young Trainer. They are cutting off the tails of the Slowpoke that are sacred in Azalea, intending to sell them for a large profit. Kurt, a local maker of specialty Poké Balls, is greatly angered by this, and requests the player's help in chasing away Team Rocket and saving the Slowpoke. Though he falls into Slowpoke Well, hurting himself in the process, he begs the player to continue on to fight the organization with their Pokémon. After this has been done, and Team Rocket is chased away from Azalea, Kurt gives the player a Lure Ball and will make his specialty Poké Balls when brought any kind of Apricorn, one per day. After defeating Bugsy in the Azalea Gym for the Hive Badge and defeating the red-haired boy (Silver) once again, the player can journey into Ilex Forest to find the Charcoal maker's Farfetch'd and get HM01 (Cut). With this, Ilex Forest can be navigated through towards Route 34. On Route 34, a Pokémon Day Care is set up, however, unlike the one found in Kanto on Route 5, it is capable of raising two Pokémon at once. The Day Care functions the same way as in other Generation IV games. If these Pokémon are similar enough, and if a male and female have been put in together, a Pokémon egg can be produced.
Venturing into Goldenrod City, the player's third badge, the Plain Badge, awaits. After defeating Whitney and getting the Plain badge, getting a Squirtbottle allows the player to move the strange tree blocking Route 36 to the north. If it is Tuesday, Thursday, or Saturday, the Bug-Catching Contest will be on at the National Park on Route 35, as well. In Ecruteak City, Bill, the developer of the PC Pokémon Storage System is performing repairs on the Time Capsule, and as the player arrives, he will finish, asking for them to come visit him in his parents' house in Goldenrod, where he will give away an Eevee. Another Gym is in Ecruteak City, where the Ghost-type Leader Morty battles for the Fog Badge. The player encounters the legendary beasts in the Burned Tower and they run off around Johto. The player also meets Eusine who is studying the Burned Tower and takes interest in Suicune.
The player goes on through Route 38 and Route 39 to arrive in Olivine City. Once there, they learn from Silver that Jasmine, the Gym Leader, is not available at the moment, since she is taking care of the lighthouse's Ampharos and refuses to leave until the Pokémon is given a special medicine from Cianwood City. The player thus surfs their way through Route 40 and Route 41 to get to Cianwood City. There, they encounter the Fighting-type type Leader Chuck, who presents the player with the Storm Badge. They get the SecretPotion from the Cianwood Pharmacy and goes back to Olivine City. Jasmine, relieved after getting her Ampharos's medicine, goes back to taking gym challenges. Her Pokémon specialty is of the Steel-type. When the player gets their sixth badge, the Mineral Badge, they travel to Mahogany Town, through Route 42. The gym is blocked by a man and the way to Route 44 and the Ice Cave is blocked by a man trying to sell Rage Candy Bars.
The player heads north to Route 43 and the Lake of Rage. Upon entering the gate, two Rocket Grunts charge them Pokémon Dollar1000 to go through. When the player gets to the lake, they encounter the Red Gyarados. After the player defeats, catches or flees from it, they get the Red Scale. A caped man named Lance appears on the shore and reveals Team Rocket's secret hideout to the player. The player goes back to Mahogany and goes through the hideout, along with Lance. Team Rocket's plan was to emit sound waves, inducing the Magikarp in the lake to evolve into Gyarados, which caused the effect of the Red Gyarados. Once the player defeats all the Rockets and disables the wave-emitting machine, they can challenge Pryce, the town's Ice-type Gym Leader.
Upon defeating the Gym Leader and obtaining the Glacier Badge, the player receives a phone call from Prof. Elm about a strange radio signal emitted by Team Rocket, trying to connect with their missing leader, Giovanni. The player goes to the Goldenrod Radio Tower to investigate. Once there, they find the Tower to be taken over by Team Rocket. When the player ascends to the top floor, they find the director of the Radio Tower, only to discover that he has been impersonated by a Rocket and that the real Director is actually locked in Goldenrod's basement. Once the player enters the basement, they are once again encountered by Silver, who intends to defeat Team Rocket all by himself. He still questions the way he treats his Pokémon. Once the player gets to the very bottom of the basement, they find the Tower's real Director. He gives the player the Card Key, so that they can access the higher floors of the Radio Tower.
After clearing all of the Rockets and defeating the Rocket executives, effectively disbanding them, the player receives either a Rainbow Wing to encounter Ho-Oh or a Silver Wing to encounter Lugia, in the HeartGold and SoulSilver versions respectively. The player can either go to the Tin Tower or the Whirl Islands at this point, to challenge Ho-Oh or Lugia, respectively. After Lugia or Ho-Oh are defeated or captured, the player can go through Ice Cave and reach Blackthorn City. There the player can challenge Clair, the Dragon-type Gym Leader. Before giving the player the Rising Badge, however, Clair makes the player go through a test to prove their worthiness. To complete this test, the player must enter the Dragon's Den and retrieve a Dragon Fang. When the player finds the item, they receive the Rising Badge from Clair. Having obtained all 8 badges, the player returns to New Bark Town, traveling down Route 45 and Route 46.
From New Bark, the path to the Pokémon League is to the east, across Route 27 and into Kanto, then across Route 26 and through Victory Road to the Indigo Plateau. When the player reaches the exit of Victory Road, Silver appears again and battles the player.
The Elite Four awaits the player if they have collected all eight Badges. When the player enters the League, they must face all four in sequence. Will, who trains Psychic-type Pokémon, is first, followed by Koga, whose specialty is Poison. Bruno, who uses Fighting Pokémon, follows, and finally, Karen, who specializes in the Dark-type type. After defeating these four, the reigning Pokémon Champion, Lance whom the player met at the Lake of Rage, challenges the player to a final battle. After his defeat, Oak and his co-host on Pokémon Talk, DJ Mary, arrive and congratulate the player. Lance then takes the player to a back room and tells the player that they are admitted into the Hall of Fame. The credits roll.
Location Changes
SPOILER: Click to view
Elm's Lab has an upstairs level, where the professor and his family live, his old house being occupied by Lyra/Ethan and her/his family.
The Battle Tower west of Olivine City, introduced in Pokémon Crystal, returns, bringing with it the exact same Battle Frontier seen in Platinum.
Two new routes, Route 47 and Route 48, are introduced near Cianwood City. They lead to a new Safari Zone, as well as the Embedded Tower and the Cliff Cave.
Mt. Silver is much bigger and Viridian Forest is not cut down.
Cerulean Cave and the Seafoam Islands remain as they were in Generation III (though Blaine still takes part of the Seafoam Islands), allowing the legendary Pokémon that live inside them to be battled. Moltres, formerly found in Victory Road and Mt. Ember, can be found in Mt. Silver.
The Fighting Dojo in Saffron City takes a role similar to Sinnoh's Battleground, where the rematches between the player and Gym Leaders take place.
Union Cave's ladder from 1F to B1F has been shifted north (now closer to the north entrance). There are also many minor changes to B1F.
The Route 23 in Generation II is now a part of Indigo Plateau. Route 23 no longer exists.
WORK IN PROGRESS
also let me know if you want anything coveredEdited once, 4/1/12 - 4:47am.
Posted on Wednesday, 4th January 2012