Demon Fossil

are recurring in .
==Location and Uses==
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 are a common of . They can be found inside , , or under piles of leaves. As with most treasure can also buy them from shops, or to win them with a .
 can sell are for 50 each, or trade them with as part of the cost for the , the , the and the .
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In , are bronze-rarity awarded for completing the following and of the :
*, "Pop all balloons!": one 
*, "Transport the orb quickly!": two 
*, no challenge: one 
*, "Pop all balloons!": two 
*, "Fewer Heart Containers!": two 
*, no challenge: two 
They can also be won in the and , or purchased from the for 250 each.
 are one of the used to make the and .
==Nomenclature==