A shortened version of this game was later released in North America by Taxan
as Mystery Quest
. The changes made from this game to Mystery Quest
are as follows: In Mystery Quest, Hao begins the game with the ability to use magic and can upgrade by obtaining the Roll of Magic. In Hao Kun no Fushigina Tabi, the Roll of Magic gives him magic and a Magic Wand upgrades it.
Hao starts Mystery Quest with the Faster Boots; in Hao Kun no Fushigina Tabi they must be earned.
Mystery Quest offers only two worlds and four castles (Hao Kun no Fushigina Tabi's castles 5 and 6) and omits Hao Kun no Fushigina Tabi's World 3.
The outdoor sections are shorter and the castle entrances appear sooner in Mystery Quest.
World entrances are also moved to other locations in Mystery Quest.
Various items are moved to different locations and some are even removed in Mystery Quest. As a result, certain sections of a castle cannot be accessed.
Mystery Quest ends with a text-based ending (with a lot of Engrish). Hao Kun no Fushigina Tabi shows a graphic ending with staff credits.