Pokemon BW: New Rules
Abilities: The BW series introduces Pokemon that have "abilities." Abilities are a Pokemon's powers other than its attacks. If you have a Pokemon with an ability in play, you can use that ability during your turn. There are also abilities with effects that only work when a Pokemon is brought into play, and there are abilities that can't be used if you don't meet certain requirements, so read the explanatory text written on the card carefully. Note: The way Poke-Powers and Poke-Bodies from the LEGEND series and earlier are used hasn't changed. Also, abilities, Poke-Powers, and Poke-Bodies are treated as different types of powers. For example, if you used an attack that does 10 damage to Pokemon with Poke-Powers, it wouldn't affect Pokemon with Poke-Bodies or abilities.
Trainers: Starting with the BW series, "Trainer" cards are called "Trainer's" cards. Although the classification has changed, if multiple cards have the same name, they're treated as the same card. The Trainer card “Pokeball” from the LEGEND series and the Trainer’s card “Pokeball” included in the BW Starter Set are the same card.
Using Trainer's on the first turn of the game: The player going first can now use Trainer's cards on the first turn of the game. Trainer cards from the LEGEND series and earlier can also be used.
Supporters: Starting with the BW series, cards called "Supporters" are now "Support" cards. Moreover, the rule stating that to use a Support card you must place it next to your Active Pokemon and discard it at the end of your turn is gone. After using a Support card, don't leave it in play, discard it immediately. Immediately discard Supporter cards from the LEGEND series and earlier, as well.
Pokemon BW: Erratas
Rare Candy: You can no longer play "Rare Candy" on your first turn. Moreover, you can't Evolve a Basic Pokemon that you just played down during your turn into a Stage 1 Evolved Pokemon. The purpose of the card is now to Evolve a Basic Pokemon that was played during a previous turn into a Stage 2 Evolved Pokemon. Use this new effect for all Rare Candy cards from the LEGEND series and earlier.
Rare Candy: Choose a Stage 2 Evolution card from your hand that Evolves from the Stage 1 form of 1 of your Basic Pokemon, and play it on top of that Basic Pokemon to Evolve it. This card can't be used during your first turn, or on a Basic Pokemon that was just brought into play during this turn.
Plus Power: Plus Power's effect has changed so that on the turn it's used, (all of) your Pokemons’ attacks do an additional 10 damage. Unlike before, you can't choose the Pokemon you use it on. Also, you no longer attach it to a Pokemon when it's used, you immediately discard it. Use this new effect for all Plus Powers from the LEGEND series and earlier.
Plus Power: During this turn, your Pokemons' attacks do an additional 10 damage to any Active Pokemon.
Potion: Potion can now heal 30 damage. Use all Potion cards from the LEGEND series and earlier as cards that heal 30 damage.
Great Ball: Great Ball's effect has changed. Use this new effect for all Great Balls from the LEGEND series and earlier.
Great Ball: Look at the top 7 cards from your deck. Choose 1 Pokemon from among those cards, show it to your opponent, and put it in your hand. Return the remaining cards to your deck and shuffle your deck.
Knock Outs: The procedure when a Pokemon is Knocked Out has changed:
Old way: 1) Player performing the Knock Out Knocks Out the opponent's Pokemon. 2) Player with the Knocked Out Pokemon discards the Knocked Out Pokemon. 3) Player with the Knocked Out Pokemon advances a Pokemon from his or her Bench. 4) Player performing the Knock Out takes 1 Prize card.
New way: 1) Player performing the Knock Out Knocks Out the opponent's Pokemon. 2) Player with the Knocked Out Pokemon discards the Knocked Out Pokemon. 3) Player performing the Knock Out takes 1 Prize card. 4) Player with the Knocked Out Pokemon advances a Pokemon from his or her Bench.
Quelle:http://pokebeach.com/