Bom, fiz um sisteminha simples aqui pro vxa, ele basicamente solta um pop up quando tu recebe gold xD
Nâo vou por screens, testem ai e vejam o resultado kkk

Código:

class Gold_PopUp < Sprite
  attr_accessor :value, :icon
  def initialize
    super
    self.x = $game_player.screen_x
    self.y = $game_player.screen_y - 50
    self.bitmap = Bitmap.new(100, 50)
    @value = 0
    @icon = 0
  end
 
  def refresh
    self.bitmap.clear
    self.bitmap.font.size = 13
    draw_icon(@icon, 0, 0)
    self.bitmap.draw_text(23, -9, self.width, self.height, @value.to_s, 0)
  end
 
  def draw_icon(icon_index, x, y, enabled = true)
    img = Cache.system("Iconset")
    rect = Rect.new(icon_index % 16 * 24, icon_index / 16 * 24, 24, 24)
    self.bitmap.blt(x, y, img, rect, enabled ? 255 : translucent_alpha)
  end
 
  def update
    if Graphics.frame_count % 5 == 0
      $pop_up.opacity -= 15
      $pop_up.y -= 2
      if $pop_up.opacity == 0
        $pop_up.dispose
        $pop_up = nil
        $active = false
      end
    end
  end
end

class Game_Party
  alias :gold_pop :gain_gold
  def gain_gold(amount)
    if defined?($active)
      return if $active
    end
    @gold = [[@gold + amount, 0].max, max_gold].min
    $pop_up = Gold_PopUp.new
    $pop_up.value = amount
    $pop_up.icon = 361
    $pop_up.refresh
    $active = true
  end
end 

class Scene_Map
  alias :popup_main :main
  def main
    $pop_up = Gold_PopUp.new
    popup_main
    $pop_up.dispose if !$pop_up.nil?
  end
  alias :popup_update :update
  def update
    popup_update
    $pop_up.update if !$pop_up.nil?
  end
end

Muito bom cara...

Ficou legal, mas evite usar if !... use unless , seria legal ampliar para itens também, boa sorte , e parabéns