The official Pokémon Black Version and Pokémon White Version has revealed tons of new information about the upcoming games. Below is all the newly revealed information.

Pokémon Names

N#	English	Japanese	Romanized	German	French	Spanish	Italian	Thumbnail
506	Lillipup	ヨーテリー	Yorterry	Yorkleff	Ponchiot	Lillipup	Lillipup
507	Herdier	ハーデリア	Herderrier	Terribark	Ponchien	Herdier	Herdier
509	Purrloin	チョロネコ	Choroneko	Felilou	Chacripan	Purrloin	Purrloin
510	Liepard	レパルダス	Lepardas	Kleoparda	Léopardus	Liepard	Liepard
513	Pansear	バオップ	Baoppu	Grillmak	Flamajou	Pansear	Pansear
515	Panpour	ヒヤップ	Hiyappu	Sodamak	Flotajou	Panpour	Panpour
531	Audino	タブンネ	Tabunne	Ohrdoch	Nanméouïe	Audino	Audino
562	Yamask	デスマス	Deathmas	Makabaja	Tutafeh	Yamask	Yamask
586	Sawsbuck	メブキジカ	Mebukijika	Kronjuwild	Haydaim	Sawsbuck	Sawsbuck
587	Emolga	エモンガ	Emonga	Emolga	Emolga	Emolga	Emolga
596	Galvantula	デンチュラ	Dentula	Voltula	Mygavolt	Galvantula	Galvantula
611	Fraxure	オノンド	Onondo	Sharfax	Incisache	Fraxure	Fraxure
612	Haxorus	オノノクス	Ononokus	Maxax	Tranchodon	Haxorus	Haxorus

Take Turns with Rotation Battles!

Rotation Battles are a brand-new way to compete against other Trainers in Pokémon Black Version and Pokémon White Version. In this new style of battle, each opponent chooses three Pokémon. Only one Pokémon from each side is battling at any given time, but players can choose to rotate another Pokémon into action during their turn. That Pokémon can then attack on the same turn! Although you choose three Pokémon at the start, only one of those Pokémon will be battling each round. There are additional buttons on the Touch Screen to rotate Pokémon when you are choosing your moves. Before issuing any other commands, you can choose to swap your battling Pokémon with one to the left or right of it. Be alert in case your opponent's Pokémon has an advantage over yours. Rotate a different Pokémon into battle to turn the tables! Watch out—your opponent can do the same thing back to you when it's his or her turn!

Team Plasma

A group called Team Plasma has recently appeared in the Unova region. While their motives are unclear, it's obvious that they have criminal intentions, including stealing Pokémon! You'll learn more about their plans when you overhear speeches from their members and their leader. When you arrive in town, Team Plasma is already preparing for the speech. It seems that wherever you go, Team Plasma has already managed to get there before you. You'll have to confront Team Plasma quite a bit as they attempt to slow down your progress. The men and women of Team Plasma will challenge you throughout your adventure.

At Play in the Pokémon Dream World!

Grow Berries in Your Garden! - Berries have always been a useful resource for Pokémon Trainers. But in the Unova region, Berries are pretty rare. Fortunately, you can grow your own Berries in the Pokémon Dream World, then transfer them into your game!

Trade Items with Players! - Explore the Island of Dreams in the Pokémon Dream World to find items. Then, you can put these items and Berries you've grown on the Share Shelf in your home. When other players visit, they can exchange their items for ones on your Share Shelf. You can trade for different kinds of Berries and increase the variety of Berries you can grow!

Keep the Items You've Found - All of the items and Berries you'll find in the Pokémon Dream World can be brought into your Pokémon Black Version or Pokémon White Version game. Just put them in the Treasure Chest in your home, then transfer them to your game all at once.

Decorate Your Home! - Your home is the hub for all of your activities in the Pokémon Dream World. Have fun decorating it to look exactly how you want it to!

The Pokémon Musical!

Feel the beat in the Pokémon Musical! Dress Up your Pokémon with various Props, then watch it dance to the music. You can even play the Pokémon Musical with your friends! Just get up to four players together, each with their own Nintendo DS system and copy of Pokémon Black Version or Pokémon White Version. During your journey, you'll reach the city where the Pokémon Musical takes place. On your first visit, you'll receive a Prop Case to store all the Props you'll receive. There are several different shows for the Pokémon Musical. Talk to the receptionist to choose a show. Before the spotlight comes up, you'll get a chance to Dress Up your Pokémon with a variety of Props. Your Pokémon's performance begins as soon as you've finished Dress Up.

Gym Leader Names

English	Japanese	Romanized	Thumbnail
Cilan, Chili, Cress	「デント」 「ポッド」 「コーン」	Dent, Pod, Corn
Lenora	アロエ	Aloe
Burgh	アーティ	Arti
Elesa	カミツレ	Kamitsure
Clay	ヤーコン	Yakon
Skyla	フウロ	Fuuro
Brycen	ハチク	Hachiku
Iris & Drayden	「アイリス」 「シャガ」	Iris & Shaga

Elite Four / Champion Master / Sage

English	Japanese	Romanized	Thumbnail
Shauntal	シキミ	Shikimi
Grimsley	ギーマ	Gima
Marshal	レンブ	Renbu
Caitlin	カトレア	Katorea
Alder	アデク	Adeku
Ghetsis	ゲーチス	Geechisu

Source: http://www.pokemonblackwhite.com