Kel and Leon specialize in selling items and supplies to various adventurers when going into Mystery Dungeons and have connections with various factories across the globe. Kel sells a variety of food and tools to Expedition Teams, while his brother Leon stays in Sunnytown to run the shop. They sell traditional exploration stuff like food, seeds, orbs, and tms, but their main source of income is diapers. On some occasions they sell tf victims, including teams that steal from their shop. If Leon spots you stealing from him, you’ll end up joining his inventory, whereas stealing from Kel will get you either sold to a team or kept for himself. Many teams learned to never steal from Kecleon Shops in Mystery Dungeons since they pretty much KO you in one attack.

Most recently, the Pokemon Expedition Team Chicolu had a run in with Kel and Leon during one of their travels. Since they defeated Darkrai and saved the world they figured they could demand either free diapers or at least a discount, which they refused. Afterwards the four fought each other over the argument and disagreements, and the two learned the hard way that you don't mess with Kecleon Shop owners or you'll be adding to their inventory. And since they saved the world they won't come cheap, plus Kel and Leon pride themselves on either high-quality diapers or high-quality victims. But since these pokepamps are very large, so pokemon roughly around Snorlax sizes may be the only ones who can wear them...