List of uncommon items:
Cera : Use this to grow the first kind of fin on both sides of his body
Sphaera : Use this to grow a second type of fin on either side of it
Orubic : Use this to grow a third kind of fin on either side of it
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(Note: that in order to become a fish, their tail must be the tail of a marine creature)
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Ghost_flower : Use this to make small ghosts appear around it
Ghost tail fruit : Use this to turn its tail into a ghost tail
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Trail items: