Despite being described as a place no normal Mii could visit, Inn's still exist in this world.
One theory is that it is the work of the 'deity of well-placed inns,' mentioned at the beginning of the game and not explained upon otherwise.
The Otherworld has a place where players can discover up to three Very Rare Snurps and two Rare Snurps, making it the ideal spot to farm for experience.
Otherworld has the lowest amount of required stages, at three stages and a boss.