MIReplacer - (Requires MMOItems)

Code (YAML):

Options :
  # When enabled, stores the whole config into memory for performance.
  # Is highly recommended, but may take up some RAM if using a VERY large config.
  # NOTE: Some features will not work as intended and may be entirely disabled if
  # this is set to false. ONLY do this as a last resort if MIReplacer is lagging!
  cacheConfig : true
  # List of worlds that uses MIReplacer. Leave empty to use it server-wide.
  # worldList: ["world", "world_nether", "world_the_end"]
  worldList : [ ]
  # Whether converted items should keep old enchantments once converted.
  keepEnchantments : true
  # Whether custom names carry over from old items once converted.
  keepCustomNames : true
  # The item name of the random item displayed when using weights in crafting.
  previewItemName : "&1Random Item"
  # {itemname} will be replaced by the name of the possible item.
  previewItemIndex : "&f- &9Possible Item: &f{itemname}"
  # The lore to display when previewing items to be crafted.
  # set to 'craftingLorePreview: []' to disable this feature.
  craftingLorePreview :
 - "&7This is a placeholder item."
  - "&7Stats will remain hidden until crafted!"

Convert-On :
  # Convert items when picked up from the ground
  pickup : true
  # Convert items when crafted in the crafting table
  craft : true
  # Convert items when smelted in a furnace. (Blast & Smokers on 1.14+)
  # !!! IMPORTANT: Servers must be restarted when changing the config
  # !!! for smelted recipes to work correctly when replacing!
  smelt : true
  # Convert when chests are being opened. This only applied once per
  # individual chest/minecart (resets on server restarts)
  chest : true
  # Convert when item is moved around in the inventory.
  # This one will call A LOT of events and therefore may not
  # be suited for larger servers. Most of the time there won't
  # even be the need for it, so best to leave it off.
  inventory-change : false

ConversionItems :
  # This will turn any brick into an MMOItems Steel Ingot
  BRICK : MATERIAL.STEEL_INGOT
  # Iron Swords into MMOItems Cutlass...
  IRON_SWORD : SWORD.CUTLASS
  # Diamond Sword = Falcon Blade
  DIAMOND_SWORD : SWORD.FALCON_BLADE
  # This Gold Nugget will turn into a gold coin, but
  # enchantments won't carry over, regardless of the global option.
  # This also works the other way around so if global is false and
  # the individual item is true, then enchantments will only carry
  # over for the individual item and not for other replacements.
  GOLD_NUGGET:
    item : MISCELLANEOUS.GOLD_COIN
    keepEnchantments : false
    # [!] This setting also works here:
    # keepCustomNames: false
  # This is a weighted list, making replacements random.
  # Each entry requires an item and a weight. Higher
  # weight means more likely. This is an example where
  # an Iron Axe will commonly turn into a Butcher's Axe
  # or a Bone Cracker and in rare cases a Skull Breaker.
  IRON_AXE :
    # the numbers don't have to be numbers, they
    # can be anything. Be like the numbers. Be anything.
    1:
      item : AXE.BUTCHER_AXE
      # The total weight is summed and then a random numbers
      # between 0 and summed weight is generated. The random
      # number is then subtracted by each choices weight and once
      # it hits 0 or less the candidate will be found.