We propose the design of an activity game and virtual pet for smart-watches that combines casual game design principles, lessons from fitness trackers, and location-based features. Players take care of a newly hatched dragon that grows and changes depending on their activities, reflecting their general fitness in a playful and encouraging manner. Where most virtual companions are aimed at children, we designed this game with young adults in mind. An early PC prototype was tested by ten members of this target group to gauge interest and inform design iterations. The general design of the game and the virtual dragon were mentioned as strong points, while the emulation on the PC was considered not intuitive. Upcoming prototypes will be tested on smart-watches, with the ultimate goal of exploring the impact of connecting a virtual pet to the physical location of a player on engagement and activity levels.