Which monster is your favorite?
Before this expansion, the answer to this question was based solely on the appearance and style of the monster. With the Power Up expansion, each monster gets is unique set of evolution cards which drastically change the game. Each time you score 3 hearts on a die roll you get to draw one evolution card. These can be temporary (like a one-time boost in health) or permanent (like a +1 attack for the rest of the game). These cards give each monster its own unique feel, since the most of the monsters have some theme surrounding their cards: The King monopolizes Tokyo, Gigazaur is all about attacking, the Kraken is heavy on the healing, etc.
And if that wasn't enough, you also get the awesome Pandakai.
Overall, this expansion will surely spice up your King of Tokyo games.