Since late 2011, each booster has contained one card printed with a code to redeem cards on the game's digital version (originally Pokemon TCG Online, now Pokemon TCG Live)
they're neat-looking, and kinda cool, but I don't have a whole ton to say about them other than maybe make jokes about Naruto and One Piece, and I'm too sleepy to think up of any good material
On turn 2 with a Singer it does the same job of stopping your character from getting challenged while drawing a card
Taillow C - Wing Attack 20 Swellow C - -Add On Draw 3 cards
Generally speaking, this takes the form of ritual spells as well as cards that generate mana whenever a creature dies
Alongside these features, a wide range of missions and events are introduced, including Elite Deck rewards, special battle challenges, and collection tasks that provide valuable cards and items