Rance 4:Items

Rare Items
Some non-essential items are rare drops inside Treasure Lumps around certain general areas. There's no tricks currently known for getting them except grinding. The rewards are very good, however.
 * Belief Key: Buster Sword
 * Betrayal Key: Hanny Knife
 * Chernen Powder: The item shop becomes Rance's. Everything costs no gold, and Yocchan becomes Rance's as well (new CG).

Black Sword
In the main tower of Surface Central Area, you can exchange any 3 swords for Black Sword. The attack power of Black Sword will equal half of the sum of 3 swords' attack. Stamina requirement is always 10, and the sword is always dark elemental. Thus, you should use strong but impractical swords (due to stamina cost) to obtain Black Sword.
 * Strongest possible Black Sword (73 attack; possible in Chapter 5): Invincible Sword + Buster Sword + Blaze Blade
 * However, obtaining Black Sword in Chapter 4 will make the rest of the game much easier. Invincible Sword + Golden Sword + Buster Sword gives 70 attack Black Sword. If you don't have Buster Sword, then just use another Golden Sword for 62 attack Black Sword.

Yocchan's Bargains
Yocchan's item shop has the same items for every section except the bargains.
 * Ninja Blade (Chapter 4)
 * Ice Rapier (Chapter 6)
 * Arme's Pajamas (Chapter 5)
 * Coarse Armor 2 (Chapter 5)
 * Iron Hanny Key (Chapter 5)

Hanny Shops
West Tower 4F has a shop ran by a Hanny. It has some amazing consumable items like Hirami Lemon worth buying. Also, in Chapter 6, the shop starts selling Illusion Key!

Another Hanny shop is in Tousho Core B4F. This shop sells some of best equipments in game at high prices.

Mirror Fragments
Throughout the game, you can find Mirror Fragments. Bringing 4 fragments from the same mirror together saves the girl from the mirror, and you get a reward.
 * Set A, Rukira: 2000 gold
 * Set B, Ella: Lightweight Bow
 * Set C, Gezona: Lionet
 * Set D, Oichi: Strength Spray

Canes

 * Wood Stick                      att 1 st 3
 * Witch Wand
 * Kapara Dagger
 * Staff of Fire
 * Wand of Light
 * Surpeised Hammer
 * Tulip No. 1
 * Bow of Lightweight
 * Witch Whip
 * Alice Sword                    att 48 st 16

Daggers

 * Mini Hammer                  att 5 st 5
 * Sword of Wind               att 13 st 10
 * Honey Knife
 * Toukichiro's Bow            att 20 st 10 Range 3
 * Sword of the Sun
 * Ninja Blade
 * Rapier Ice

Other

 * Rocket Punch
 * Giga Attack Bow
 * Phosphorescent Light

Armor

 * Used Armor                       def 5
 * Crimson Armor
 * Insulator Armor
 * Armor                               def 18
 * Spriggan V                       def 20
 * Guard Armor                    def 20
 * Coarse Armor                  def 21
 * Coure Armor
 * Cursed Armor
 * Riot
 * Lyonnet R
 * Course Armor 3

Heavy Armor

 * Leazas Regular Armor     def 40
 * Helman Regular Armor
 * God Armor

Clothes

 * Plering Robe                   def 1
 * Hellman Mage Uniform    def 6
 * Undazzle Dress               def 9  Electric
 * Wind Ninja Clothes         def 11
 * Bebetar Costume           def 10
 * Death Surcoat                def 14 Dark

Shield

 * Used Shield                    def 2
 * Flame Shield                  def 5  Fire
 * T33-Type Round Shield def 15
 * Nay Shield                      def 10
 * Mini Shield                      def 4