Kecleon

Kecleon Is A Normal Type Pokemon That Made It's First Debut In Pokemon Ruby And Sapphire. And Then Used In This Game

Info
In This Game, Those Who Hack Honoguma As A Starter, Who Didn't Win The Challenge, Are Put In A Fight Against Kecleon. Kecleon Strips Away The Use Of Potions And Has 1,000,000,000 HP So You Can't Use Honoguma Unless You Beat Challenge #3.

Trivia
Kecleon Being An Anti Cheater System Is A Reference To Both:

Pokemon Mystery Dungeon

Anti Piracy In Video Games