You can trade the elder merchant in Ioka village for some weapons and armor if you bring him a specific combination of petals, fangs, horns, and feathers found by defeating enemy’s in the prehistoric era. The hunting grounds is the best place to get multiple items fast.

The first set of items become available during your first required story related visit to the prehistoric era, but only after the party with Ayla.


Totals needed to equip all current party members,

9 Petals
18 Fangs
18 Horns
27 Feathers

New weapons become available during the second story related visit, after the defeat of Magus


Here are the totals needed if you want all these new weapons.

9 Petals
6 Fangs
6 Horns
3 Feathers

Later in the game after you revive Crono you can get,

Ruby Armor for 10 of each item.