Buddy Pokémon will appear alongside your Trainer avatar on your profile screen. A Trainer can earn Candy for their buddy by walking a certain distance. When you want a different experience, you will be able to choose a new buddy at any time.
I’m not sure if this can help with the declining daily active users (DAU) but from the comments of the posts looks like Pokemon Go trainers are excited with the new update.
Buddy Pokemon will be available in the next update of the Pokemon Go app.
Last modified: September 3, 2016