Munna do not only feast on the dreams of the sleeping, for which they are famous; if they become hungry during the day or surrounded by too many insomniacs, they will also devour daydreams. This pokemon's victims typically report that soon after seeing a Munna, they become overcome with a powerful feeling of ennui, for they had forgotten the dreams they had spent their lives trying to make come true. Only once the Munna has moved on do they regain the vigor which hope provides.
Yet if their motivation for performing whatever task is at hand does not relate to their dreams, those fed on by Munna gain the ability to throw themselves with renewed focus into their work. For this reason, early psychologists thought to use Munna to treat the easily distracted, in a series of experiments which succeeded in producing more focused and diligent workers, but the treatment proved tragically irreversible; many of these individuals either changed their lives completely when a different dream replaced the old, or found no new dreams, only a deep despair culminating in suicide.
This treatment was soon banned, and remains a black mark on the psychological profession to this day, but overwhelming daydreams still leave many lost in thought, and remain a large hurdle for anyone seeking to make their dreams come true. A few pokemon trainers have reported some success in using Munna in moderation, claiming that with adequate nutrition and a regular effort made towards making their dreams come true, these pokemon can be safely utilized on their daydreams. Most trainers, however, use their Munna only sparingly in daylight, and take great pains to let them out to eat only when about to fall asleep, terrified that this pokemon will eat the dreams which give themselves hope.