King of Tokyo: Power Up!

King of Tokyo: Power Up! is an expansion for King of Tokyo. It introduces the evolution mechanic, providing players the ability to give their monsters new powers.

Description
King of Tokyo: Power Up! adds the evolution mechanic to King of Tokyo. This allows monsters to gain evolution cards, which grant monsters new abilities. It also introduces a new monster, Pandakaï.

Each monster has their own personalized abilities, such as Gigazaur's "Detachable Tail", Kraken's "Cult Following" or Meka Dragon's "Lightning Armor".

The expansion also introduces monster categories; mutants, invaders and robots. These have no mechanical effects in this game, but may in tournaments or future expansions.

Variations
The first edition was published in 2012, and is intended for the first edition of King of Tokyo. A second edition was published in 2017, to match the second edition of the base game. Both of these obey the same basic rules, and include Pandakaï. The first edition includes 56 evolution cards for the first edition monsters. The second edition also includes 16 new evolution cards for the two new monsters, Space Penguin and Mecha Kitty.

Rules
When starting the game, each player must have a stack of 8 evolution cards face-down. By default, each player should use the deck matching their monster. If a player resolves 3 heart dice, they secretly draw the top evolution card from their deck. A player may then activate the evolution whenever they desire. A permanent evolution stays in effect, the same as a keep power card. A temporary evolution is discarded after use, the same as a discard power card.

Drawing an evolution card happens separately to the hearts' other effect. If a monster is outside Tokyo, they may heal and draw an evolution and if a monster is inside Tokyo, they may still draw an evolution despite being unable to heal.

Power cards that refer to 'cards' do not effect evolution cards. If a player runs out of evolution cards, resolving three hearts has no extra effect.

There are several official rules variations.
 * 1) Active Evolution: Each player starts with one random evolution from their deck
 * 2) Controlled Evolution: When a player draws an evolution, they draw 2, choose one and place the other on the bottom of their deck
 * 3) Evolution Draft/ Mutant Evolutions : Mix all evolution cards together and shuffle them. Deal eight to each player; they should have a mix of evolution cards from different monsters. Each player picks one card, then passes the remaining seven to the player on their left. This repeats until every player has picked eight cards. These are then shuffled and become their deck for the game.

Compatibility
King of Tokyo: Power Up! first edition is intended for use with King of Tokyo first edition, and only includes evolution cards for the first edition monsters, and Pandakaï. Power Up! second edition can be used for first or second editions of the base game, as it includes evolution cards for both sets of monsters. King of Tokyo: Power Up! can be combined with King of Tokyo Dark, as Dark uses the same monsters as first edition. However, the art style is different. The wickedness mechanic is similar to the evolution mechanic and therefore while the two can be used simultaneously, it may have unintended effects on game play.

The individually packaged monsters all include evolution decks compatible with Power Up. King of Tokyo: Halloween also includes evolution decks for the included monsters, Pumpkin Jack and Boogie Woogie.

King of New York: Power Up! includes evolution cards for King of New York monsters, allowing for them to be used in a King of Tokyo: Power Up! game. However, there is no official solution for using King of Tokyo monsters in a King of New York: Power Up! game. Promo monsters do not have specific evolution cards and there is no official solution for this. In this case, the Evolution Draft variant could be used, or monsters without official evolution decks could be given spare evolution decks.