A Loudred's earsplitting cry is so loud that even the sturdiest of poke balls can do little to block the noise. Most Loudred trainers wear earplugs when in the presence of their pokemon to avoid going deaf, but this does nothing to reduce their impact on others. Even towns which give wide tolerance for loud noises often ban Loudred from entering the municipal limits, and those which allow them to enter typically have strict restriction of how long they can stay. Although large cities, more accustomed to loud noises, typically allow passing trainers to seek medical attention or a gym match, Loudred are still usually forbidden for residents and their trainers only allowed to stay for a few days.
Taken together, these restrictions mean that the most difficult thing about training Loudred is finding somewhere to put them. Trainers currently on a League challenge face less difficulty than most, especially if they travel without human companions who would complain about the noise. This is why many Loudred trainers become perpetual wanderers, calling nowhere home and challenging region after region with their pokemon. A few leave their Loudred in forests or tall grass far from civilization, often with some identifying mark to show it is a domestic pokemon. But most refuse this option, fearing both predators and that their Loudred would be mistaken for wild and caught by another trainer; either a well-meaning one making a genuine mistake, or an unscrupulous thief searching for a powerful pokemon.
Others try more inventive solutions. Many of the greats in the field of architectural acoustics were known to have trained Loudred, and they learned and discovered much about how sound worked in buildings in order to soften their pokemon's call and let their neighbors sleep in peace!