HorrorVale - Disable enemy appear message

#-------------------------------------------------------------------------------
# Don't remove this header!
#-------------------------------------------------------------------------------
# Disable Enemy Appear
# by Trihan
#
# Version: 1.2
#
# This script is commissioned by Batworks Software.
#-------------------------------------------------------------------------------
#
# To use, just use $game_system.appear_disabled = true to turn the enemy
# appear message off, and $game_system.appear_disabled = false to turn it
# back on.
#
#-------------------------------------------------------------------------------
# Version History
#-------------------------------------------------------------------------------
# 1.2 - Disabled battle transition
# 1.1 - Disabled battle BGM and start sound
# 1.0 - Initial script.
#-------------------------------------------------------------------------------

module BattleManager
  def self.battle_start
    $game_system.battle_count += 1
    $game_party.on_battle_start
    $game_troop.on_battle_start
    if !$game_system.appear_disabled
      $game_troop.enemy_names.each do |name|
        next if (name == "Cliff")
        $game_message.add(sprintf(Vocab::Emerge, name))
      end

      if @preemptive
        $game_message.add(sprintf(Vocab::Preemptive, $game_party.name))
      elsif @surprise
        $game_message.add(sprintf(Vocab::Surprise, $game_party.name))
      end
      wait_for_message
    end
  end
end

class Game_System
  attr_accessor :appear_disabled

  alias :tlb_disableappear_initialize_8nf1 :initialize
  def initialize
    tlb_disableappear_initialize_8nf1
    @appear_disabled = false
  end
end

class Scene_Map < Scene_Base
  def pre_battle_scene
    Graphics.update
    Graphics.freeze
    @spriteset.dispose_characters
    BattleManager.save_bgm_and_bgs
    if !$game_system.appear_disabled
      BattleManager.play_battle_bgm
      Sound.play_battle_start
    end
  end

  alias :tlb_disableappear_perform_battle_transition_3gu3 :perform_battle_transition
  def perform_battle_transition
     if $game_system.appear_disabled
        Graphics.transition(0)
        Graphics.freeze
      else
        tlb_disableappear_perform_battle_transition_3gu3
     end
 end
end

class Scene_Battle < Scene_Base
  alias :tlb_disableappear_perform_transition_9ib2 :perform_transition
  def perform_transition
     if $game_system.appear_disabled
        Graphics.transition(0)
        Graphics.update
     else
        tlb_disableappear_perform_transition_9ib2
     end
  end
end