return function(mod)
  mod.content.statuses:register("TUTORIAL_CURSE", {
    label = "CURSE",
    hudLabel = "CRS",
    cureOnSwitch = true,
    residual = function(battler)
      local mon = battler.mon
      local damage = math.max(1, math.floor(mon.stats.hp / 16))
      mon.hp = math.max(0, mon.hp - damage)
      return { battler.name .. " is cursed!" }
    end,
  })
  mod.content.move_effects:register("TUTORIAL_CURSE_EFFECT", {
    kind = "primary",
    accuracyChecked = true,
    run = function(ctx)
      return ctx.inflict(ctx.target, "TUTORIAL_CURSE")
    end,
  })
  mod.content.moves:register("TUTORIAL_CURSE_MOVE", {
    id = "TUTORIAL_CURSE_MOVE",
    name = "CURSE",
    type = "GHOST",
    category = "status",
    power = 0,
    accuracy = 100,
    pp = 10,
    effect = "TUTORIAL_CURSE_EFFECT",
  })
  mod.content.pokemon:patch("ABRA", {
    learnset = { __append = { { level = 5, move = "TUTORIAL_CURSE_MOVE" } } },
  })
  mod.content.maps:patch("PALLET_TOWN", {
    objects = { __append = {
      {
        index = 93, x = 10, y = 7, sprite = "SPRITE_SCIENTIST",
        movement = "STAY", range = "NONE", text = "TEXT_TUTORIAL_CURSE_GIVER",
        name = "TUTORIAL_CURSE_GIVER",
      },
    } },
  })
  mod.content.map_scripts:register("PALLET_TOWN", {
    talk = {
      TEXT_TUTORIAL_CURSE_GIVER = {
        { "check_flag", "mod:abra_given" }, { "jump_if_true", "after" },
        { "give_pokemon", "ABRA", 5, true },
        { "jump_if_false", "full" }, { "set_field", "mod:abra_given", true },
        { "show_text", "This ABRA knows\nCURSE. Try a battle!" }, { "jump", "end" },
        { "label", "full" }, { "show_text", "Make room and\ntalk again." }, { "jump", "end" },
        { "label", "after" }, { "show_text", "Watch CURSE deal\ndamage each turn." },
        { "label", "end" },
      },
    },
  })
end