Players control both Ellie and Chomp as they explore and battle through five non-linear kingdoms in the Monster World, including the Wicked Treehouse, Monster Express Train, Ancient Ruins and Monster Nightclub. The Touch Screen serves as Chomp's Pet Sanctuary where he evolves with new abilities as he eats and plays with what Ellie provides from the top screen or buys for him in the store. But when Ellie needs some brute force or protective defense, she can summon Chomp to the top screen to back her up in her quest to save the Monster World. As Chomp gains new attributes he can evolve into approximately 30 unique forms with new attacks, shields, bombs and even the ability to transform into useful objects. Together Ellie and Chomp will take on scores of baddies that threaten to end their Monster Tale mid-adventure.