Developer Niantic Labs continues to try to dissuade users from using any type of third-party add-ons for Pokemon Go. A new update has taken things a step further with suspected cheaters having their Pokemon directly affected.

Niantic warned of the impending change in a post on reddit:

"With the announcement of Raid Battles and the new battle features, we are staying true on our commitment to ensuring that Pokémon GO continues to be a fun and fair experience for all Trainers. Starting today, Pokémon caught using third-party services that circumvent normal gameplay will appear marked with a slash in the inventory and may not behave as expected. We are humbled by the excitement for all the new features we announced yesterday.This is one small part of our continued commitment to maintaining the integrity of our community and delivering an amazing Pokémon GO experience."

There weren't many details on exactly what types of third-party add-ons will be flagged, and Niantic said that they won't go into exact details of what "may not behave as expected" actually means. Likely the biggest culprits will be GPS spoofers and mappers.

Since the change, reports have started to surface on what these erratic Pokemon do. Pokemon caught using a third party app are getting "slashed" in the Pokemon inventory, meaning they can't be used. There are also reports that offending Pokemon turned in to the professor do not get any candy in return. Reddit user KERL0N from Romania posted this image, saying that some of his slashed Pokemon were caught back in early April. Some Pokemon can get the slash removed if you evolve them, but that is likely an oversight that could be fixed in a subsequent hot fix. 

Despite the crackdown, conversation continues among some players trying to find a way to best the system. Given Niantic's track record in hating anything that goes against its terms of service, you can bet they will continue modifying their anti-cheat measures to stay ahead of the cheaters.