Arko

Star Cavern Arko, known in Japan as Rakyuo, is a dungeon in Magical Vacation inhabited by stars, and is located in the Abyssal Realm. Blackcurrant the Grand Dark Spirit observes Arko from above.

Geography
Arko's entrance is found within the side of a cliff, and on either side are stone statues depicting warped faces. Beyond them is a mystifying galaxy-like cave filled with bright stars, shimmering cosmos, and translucent walkways made of purple stardust. Some of these walkways lead to bulbous sea anemone-like growths, which turn into small portals when kicked.

Summary
After the party rescues the mudmen of May Village by defeating Ohm Zaneil, they are given a Light Veil by one of the villagers. With it, they are able to disguise themselves as stars and help those in Arko ascend to the afterlife.

Insightful Clay Pots
Arko is filled with varying numbers of stars. While most will simply depart when talked to, others need confirmation that they are dead before ascension. The main challenge Arko poses is the Clay Pots scattered about; getting within their field of vision instantly warps a party member back to the Magic Bus. Clay Pots will only disappear if every star within each area of Arko has ascended, and the player can see how many stars are left by talking to one in the final room.

Once the last star has ascended, Blackcurrant shows up to give the party a Dark Veil, allowing them to enter the Abyssal Corridor and pass through to the Earth of Darkness.

Spirits

 * Beast Spirit 5 - Arko Entrance
 * Give 30 Deparalyze Tails
 * Water Spirit 5 - Arko 3
 * Give 10 Aqua Coins
 * Sound Spirit 5 - Arko 6
 * Give 5 Vox Coins (4 with the Small Ocarina and Arancia)
 * Light Spirit 5 - Arko 7
 * Only joins if 3 or less Darkness Spirits have been recruited

Name origin
Arko is an anagram of "okra", which are flowering plants with edible seed pods.

Its Japanese name, Rakyuo (ラキューオ, Rakyūo), is also an anagram of "okra" (オクラ, Okura).

Trivia

 * Some stars in Arko reveal who they were in their previous lives. Such examples include an Insect Spirit, a sorcerer from the Fire Realm, and a solider from the Water Realm.