At the time of the release, Pokemon GO lacked many of the elements promised by the developers, including the trading system and the combat system. At the moment, there is no detailed information on how the mechanics of the combat system will be implemented for the battles of the trainers. However, the developers will certainly disclose the details when they will be ready for this. Recently, in the game, after all, there was a trade, but the combat system is still missing. And now Niantic studio finally officially announced that it is working on the long-awaited PvP-mode, which should appear in Pokemon GO by the end of the year.