"New Pokemon Go Features: Contests, Shadow Gems, and Raids"
A recent datamine of Pokemon Go suggests that Pokemon Contests, with an emphasis on comparing the size of participating Pokemon, may be returning to the game. The datamine also suggests that the Contests will offer in-game rewards and items, and that the size of the Pokemon will play a role in determining the winner. While there is no official confirmation yet, the datamine indicates that the Contests may become a permanent game mode.