There are two types of people who see themselves in the Slakoth and therefore become their trainers. The first are the procrastinators and layabouts, who see in this pokemon a warning of where their habits could lead, and train them to have a comrade (or perhaps someone to look down on) in a life which seems a constant struggle against laziness. They claim to have succeeded when their Slakoth evolve into Vigoroth, although they sadly revert to their old habits more easily than their pokemon.
The second are the ascetics – typically monks with an extreme devotion to their faith, although in this modern era some seek nothing more than a respite from a busy world. They admire Slakoth for their ability to block out their surroundings, to stand stoically against chaos even if it leaves them vulnerable in the middle of a pokemon battle. They see them as great thinkers and dreamers and have spent endless hours decoding this pokemon's speech, to see what so many hours spent lost in thought can reveal. Many have spent as much time translating as thinking, and today Slakoth's language is understood far better than most other pokemon. These ascetics return to society only when their Slakoth become Vigoroth, and see in Slaking a step just removed from enlightenment; many of them also brew Gastro Acid potions, and surprise the public with their remarkable skill in pokemon battles.
Yet these two groups, seemingly so different, are more often than not comprised of the same people at different stages in their life. A procrastinator finds discipline through an ascetic's path, but a devoted ascetic grows lazy from the strain of their routine and their detachment from external society. Only the Slakoth know how to balance such a life, but they refuse to inform anyone.