With King of Tokyo: Power Up! – an expansion for the King of Tokyo base game – Included is the new monster Pandakai, a giant panda bear. After choosing a monster, each player takes the eight Evolution cards associated with that monster, shuffles those cards, and creates a personal deck. At the end of a player's turn, if she has three hearts, she draws one Evolution card and adds it to her hand; this is possible even in Tokyo (when hearts are normally useless) and even if the hearts are used for some other action, such as healing.

A player can reveal and play an Evolution card at any time. Some Evolutions are temporary, allowing a one-time bonus, while others are Permanent, such as Gigazaur's "Tail Sweep", which allows him to change one die to a 1 or 2 each turn. Each Evolution card also identifies whether a monster is a Mutant, Invader or Robot, and while not relevant for Power Up!, this species identification could come into play in future expansions.

The rules for King of Tokyo: Power Up! contain a few variants: Players start with a random Evolution in play, or draw two cards and choose the one they want, or draft a set of Evolutions prior to the start of play. However you play, the goal of the game remains the same: Score 20 points or be the last monster standing amid the rubble of what was once Tokyo.

This second edition of King of Tokyo: Power Up! includes evolution cards for the six monsters in the second edition of King of Tokyo, the two monsters removed from the first edition of King of Tokyo (Cyber Bunny and Kraken), and the Pandakaï monster included in this item.