Credit goes to Maynara

Seth is one of the strongest assasains alive, but unfortunately, can't say the same for other grovyles. When Seth revealed himself to be a double agent for kroko, many who were loyal were in utter shock as they though Seth and Kroko were, eventually reveailng that Seth hates him.
When Seth dissapeared and hasn't been heard from, many grovyles were either attacked or turned into diapers as they though they were seth.

When Seth finished up a hit, he found out that another Grovyle was out to get him as he blamed Seth that many grovyles were run out of their homes. Despite Seth's warning, the Grovyle was easily turned into a diaper that wore, since he was not under a contract, Seth decided to try him out, Alice just watched as Seth wore his attacker and wondered if he would use him, or throw him in the dumpster, either way Seth wasn't safe as she felt like they were other grovyles waiting to ambush him.

End

Seth made life difficult for many grovyles, which is why their rarely seen, what makes Seth different is his cold expression while wearing a green tunic and wielding a sword, but doesn't stop other pokemon from turning other groyvles into diapers, either thinking it's him or to send him a message.

Seth and Alice belong to me
Pokemon belong to Game Freak