class RPG::BaseItem
  def echo_skill; note =~ /<山彦>/; end
end

class Game_Battler < Game_BattlerBase
  def echo_skill(item)
    return false if !item.is_a?(RPG::Skill)
    return false if item.stype_id != 2
    feature_objects.any?{|o|o.echo_skill}
  end
end

class Scene_Battle < Scene_Base
  #--------------------------------------------------------------------------
  # ● 戦闘行動の実行
  #--------------------------------------------------------------------------
  alias echo_execute_action execute_action
  def execute_action
    item = @subject.current_action.item
    echo_execute_action
    if @subject.echo_skill(item)
      @subject.sprite_effect_type = :whiten
      use_item_echo
      @log_window.wait_and_clear
    end
  end
  #--------------------------------------------------------------------------
  # ● スキル／アイテムの使用
  #--------------------------------------------------------------------------
  def use_item_echo
    item = @subject.current_action.item
    @log_window.display_use_item(@subject, item)
    refresh_status
    targets = @subject.current_action.make_targets.compact
    show_animation(targets, item.animation_id)
    targets.each {|target|item.repeats.times{invoke_item(target, item)}}
  end
end