CHA/kubejs/startup_scripts/itemrarity.js

ItemEvents.modification(event => {
  event.modify('academy:star_badge', item => {
    item.rarity = 'UNCOMMON'
    item.fireResistant = true
  })

  event.modify('minecraft:dragon_egg', item => {
    item.rarity = 'COMMON'
  })

  event.modify('minecraft:command_block', item => {
    item.rarity = 'COMMON'
  })

  event.modify('minecraft:conduit', item => {
    item.rarity = 'COMMON'
  })

  event.modify('minecraft:elytra', item => {
    item.rarity = 'COMMON'
  })

  event.modify('minecraft:golden_apple', item => {
    item.rarity = 'COMMON'
  })

  event.modify('minecraft:enchanted_golden_apple', item => {
    item.rarity = 'COMMON'
  })

  event.modify('minecraft:experience_bottle', item => {
    item.rarity = 'COMMON'
  })

  event.modify('minecraft:skeleton_skull', item => {
    item.rarity = 'COMMON'
  })

  event.modify('minecraft:wither_skeleton_skull', item => {
    item.rarity = 'COMMON'
  })

  event.modify('minecraft:player_head', item => {
    item.rarity = 'COMMON'
  })

  event.modify('minecraft:zombie_head', item => {
    item.rarity = 'COMMON'
  })

  event.modify('minecraft:creeper_head', item => {
    item.rarity = 'COMMON'
  })

  event.modify('minecraft:dragon_head', item => {
    item.rarity = 'COMMON'
  })

  event.modify('minecraft:piglin_head', item => {
    item.rarity = 'COMMON'
  })

  event.modify('minecraft:nether_star', item => {
    item.rarity = 'COMMON'
  })

  event.modify('minecraft:enchanted_book', item => {
    item.rarity = 'COMMON'
  })

  event.modify('minecraft:end_crystal', item => {
    item.rarity = 'COMMON'
  })

  event.modify('minecraft:totem_of_undying', item => {
    item.rarity = 'COMMON'
  })

  event.modify('minecraft:dragon_breath', item => {
    item.rarity = 'COMMON'
  })

  event.modify('minecraft:beacon', item => {
    item.rarity = 'COMMON'
  })

  event.modify('minecraft:music_disk', item => {
    item.rarity = 'COMMON'
  })

  event.modify('minecraft:heart_of_the_sea', item => {
    item.rarity = 'COMMON'
  })

  event.modify('minecraft:creeper_banner_pattern', item => {
    item.rarity = 'COMMON'
  })

  event.modify('minecraft:skull_banner_pattern', item => {
    item.rarity = 'COMMON'
  })

  event.modify('minecraft:mojang_banner_pattern', item => {
    item.rarity = 'COMMON'
  })

  event.modify('bbb:bbb', item => {
    item.rarity = 'COMMON'
  })

  event.modify('minecraft:', item => {
    item.rarity = 'COMMON'
  })

  event.modify('bountiful:decree', item => {
    item.rarity = 'COMMON'
  })

  event.modify('bountiful:bounty', item => {
    item.rarity = 'COMMON'
  })

  event.modify('cobblefoods:silver_razz_berry', item => {
    item.rarity = 'COMMON'
  })

  event.modify('cobblefoods:silver_nanab_berry', item => {
    item.rarity = 'COMMON'
  })

  event.modify('cobblefoods:silver_pinap_berry', item => {
    item.rarity = 'COMMON'
  })

  event.modify('cobblefoods:golden_razz_berry', item => {
    item.rarity = 'COMMON'
  })

  event.modify('cobblefoods:golden_nanab_berry', item => {
    item.rarity = 'COMMON'
  })

  event.modify('cobblefoods:golden_pinap_berry', item => {
    item.rarity = 'COMMON'
  })

  event.modify('cobblefoods:silver_platter', item => {
    item.rarity = 'COMMON'
  })

  event.modify('cobblefoods:golden_delicacy', item => {
    item.rarity = 'COMMON'
  })

  event.modify('cobblefoods:roasted_silver_razz_berry', item => {
    item.rarity = 'COMMON'
  })

  event.modify('cobblefoods:roasted_silver_nanab_berry', item => {
    item.rarity = 'COMMON'
  })

  event.modify('cobblefoods:roasted_silver_pinap_berry', item => {
    item.rarity = 'COMMON'
  })

  event.modify('cobblefoods:roasted_golden_razz_berry', item => {
    item.rarity = 'COMMON'
  })

  event.modify('cobblefoods:roasted_golden_nanab_berry', item => {
    item.rarity = 'COMMON'
  })

  event.modify('cobblefoods:roasted_golden_pinap_berry', item => {
    item.rarity = 'COMMON'
  })

  event.modify('lootbags:loot_bag', item => {
    item.rarity = 'COMMON'
  })

  event.modify('numismatic-overhaul:bronze_coin', item => {
    item.rarity = 'COMMON'
  })

  event.modify('numismatic-overhaul:silver_coin', item => {
    item.rarity = 'COMMON'
  })

  event.modify('numismatic-overhaul:gold_coin', item => {
    item.rarity = 'COMMON'
  })

  event.modify('scout:upgraded_satchel', item => {
    item.rarity = 'COMMON'
  })

  event.modify('scout:upgraded_pouch', item => {
    item.rarity = 'COMMON'
  })

  event.modify('heartstone:heartstone', item => {
    item.rarity = 'COMMON'
  })
})