Despite being described as a place no normal Mii could visit, Inns 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 four stages, a chest and a boss.
Otherworld is one of the places including a treasure vault. Other places include Neksdor and Karkaton. Said treasure vault is located on one of the floating rock platforms accessed via an invisible path.
In one of the stages in the Otherworld, there is a banana hunt path. The player can get up to 3 HP Bananas every time they go through it.
Aside from the first four worlds, Otherworld and the Sky Scraper are the only two worlds to be connected.
If one reverses the map and/or title music for the Otherworld, players discover that it has a More calm sound.
The calm and eerie title screen if the player saves and quits in Otherworld.