Items are sometimes buff your stats or you can learn moves from them.
Some items can be obtained by beating a specific monsters.
Check the List of Items.
Pages in category "Items"
“ Here are the list of items that can be found in Vulpin Adventure. NAIS: Not Available in Shop
List of Items
“ The Silver Ring is an item that can be brought by the Shop. It has defense+2 and costed 25 Shards.