It's been a while.
I purchased one English 2014 Pokemon Trading Card Game XY Booster Pack for about $4.

That pack includes 10 game cards, and 1 code card for 1 online booster pack.
I haven't purchased a Pokemon Booster Pack since the Neo Revelation release in 2001, so I don't know what to expect!
Code Card

Common Cards
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3 - Weedle

This card would have came in handy back in the day when I used to battle loads of Grass and Water Pokemon.
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49 - Spoink

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104 - Skitty

This overpowered card should be banned in tournaments.
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135 - Lightning Energy

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140 - Fairy Energy

Uncommon Cards
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25 - Braixen

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70 - Krokorok

I've never seen a Pokemon so happy in this card game.
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121 - Muscle Band

Pretty cool Trainer card. I can't wait to use it.
Rare Cards
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Reverse Holo 21 - Magcargo

This is my favorite illustration from this pack. Magcargo looks proud gliding on lava.
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Holo 41 - Greninja

I can see why Greninja is a fan favorite.
I've learned that one Reverse Holo card is included in every booster pack. It's cool that mines ended up being a second Rare card.