没看明白你的需求，凭猜测给你解答一下：
在一技能上加公共事件，添加技能二，删除技能一，打开开关X。
在二技能后面加公共事件，删除技能二，添加技能一，并关闭开关X。
开关可能不是必须的。

#==============================================================================
# F01 - 细节美化 - Ｂｙ芙蕾娅
#------------------------------------------------------------------------------
# 　★ - 新增 ☆ - 修改 ■ - 删除　● - 无变更
#==============================================================================
module Freya
# 值槽的种类
# 0 = 默认
# 1 = 描绘边框
# 2 = 渐变
# 3 = 描绘边框 + 渐变
Gauge_Type = 3
end
#==============================================================================
# ■ Window_Base
#------------------------------------------------------------------------------
# 　游戏中所有窗口的父类
#==============================================================================
class Window_Base < Window
#--------------------------------------------------------------------------
# ☆ 放大字体尺寸
# 放大字体尺寸从8更改为4
#--------------------------------------------------------------------------
def make_font_bigger
contents.font.size += 4 if contents.font.size <= 64
end
#--------------------------------------------------------------------------
# ☆ 缩小字体尺寸
# 缩小字体尺寸从8更改为4
#--------------------------------------------------------------------------
def make_font_smaller
contents.font.size -= 4 if contents.font.size >= 16
end
#--------------------------------------------------------------------------
# ☆ 绘制值槽
# rate : 比率（1.0 为满值）
# color1 : 渐变色的左端
# color2 : 渐变色的右端
# 增加了绘制种类
#--------------------------------------------------------------------------
def draw_gauge(x, y, width, rate, color1, color2)
if Freya::Gauge_Type == 0
fill_w = (width * rate).to_i
gauge_y = y + line_height - 8
contents.fill_rect(x, gauge_y, width, 6, gauge_back_color)
contents.gradient_fill_rect(x, gauge_y, fill_w, 6, color1, color2)
elsif Freya::Gauge_Type == 1
fill_w = ((width - 2) * rate).to_i
gauge_y = y + line_height - 8
contents.fill_rect(x, gauge_y, width, 6, gauge_back_color)
contents.gradient_fill_rect(x + 1, gauge_y + 1, fill_w, 4, color1, color2)
elsif Freya::Gauge_Type == 2
fill_w = ((width) * rate).to_i
gauge_y = y + line_height - 8
contents.fill_rect(x, gauge_y, width, 6, gauge_back_color)
contents.gradient_fill_rect(x, gauge_y, fill_w / 2, 6, color1, color2)
contents.gradient_fill_rect(x + fill_w / 2, gauge_y, fill_w / 2, 6, color2, color1)
elsif Freya::Gauge_Type == 3
fill_w = ((width - 2) * rate).to_i
gauge_y = y + line_height - 8
contents.fill_rect(x, gauge_y, width, 6, gauge_back_color)
contents.gradient_fill_rect(x + 1, gauge_y + 1, fill_w / 2, 4, color1, color2)
contents.gradient_fill_rect(x + 1 + fill_w / 2, gauge_y + 1, fill_w / 2, 4, color2, color1)
end
end
#--------------------------------------------------------------------------
# ☆ 以 当前值／最大值 这样的分数形式绘制当前值和最大值
# current : 当前值
# max : 最大值
# color1 : 当前值的颜色
# color2 : 最大值的颜色
# 稍微缩小字体大小，移动一些坐标
#--------------------------------------------------------------------------
def draw_current_and_max_values(x, y, width, current, max, color1, color2)
change_color(color1)
xr = x + width
contents.font.size = 15
if width < 96
draw_text(xr - 40, y, 42, line_height, current, 2)
else
draw_text(xr - 92, y, 42, line_height, current, 2)
change_color(color2)
draw_text(xr - 52, y, 12, line_height, "/", 2)
draw_text(xr - 42, y, 42, line_height, max, 2)
end
contents.font.size = Font.default_size
end
end

#==============================================================================
# F08 - 战斗敌人显示血条 - Ｂｙ芙蕾娅
#------------------------------------------------------------------------------
# 　★ - 新增 ☆ - 修改 ■ - 删除　● - 无变更
#==============================================================================
module Freya
# 隐藏HP的文本
HideGaugeText = "Hide_Gauge"
# 血条颜色
EnemyHPGaugeColor1 = Color.new(64,128,96)
EnemyHPGaugeColor2 = Color.new(96,192,160)
end
#==============================================================================
# ■ Sprite_Battler_HP
#------------------------------------------------------------------------------
# 　显示战斗者的生命在战斗者的精灵下面。
#==============================================================================
class Sprite_Battler_HP < Sprite
#--------------------------------------------------------------------------
# ● 初始化对象
#--------------------------------------------------------------------------
def initialize(viewport,battler)
super(viewport)
@battler = battler
@last_hp = 0
create_bitmap
update
end
#--------------------------------------------------------------------------
# ● 释放
#--------------------------------------------------------------------------
def dispose
self.bitmap.dispose
super
end
#--------------------------------------------------------------------------
# ● 生成位图
#--------------------------------------------------------------------------
def create_bitmap
@last_hp = @battler.hp
bw = 96
bh = 6
self.bitmap = Bitmap.new(bw, bh)
self.bitmap.fill_rect(0, 0, bw, bh, Color.new(32,32,64))
if Freya::Gauge_Type.nil? or Freya::Gauge_Type == 0
hp = ((bw) * @battler.hp_rate).to_i
self.bitmap.gradient_fill_rect(0, 0, hp, bh, Freya::EnemyHPGaugeColor1, Freya::EnemyHPGaugeColor2)
elsif Freya::Gauge_Type == 1
hp = ((width - 2) * @battler.hp_rate).to_i
self.bitmap.gradient_fill_rect(1, 1, hp, bh - 2, Freya::EnemyHPGaugeColor1, Freya::EnemyHPGaugeColor2)
elsif Freya::Gauge_Type == 2
hp = ((width) * @battler.hp_rate).to_i
self.bitmap.gradient_fill_rect(0, 0, hp / 2, bh, Freya::EnemyHPGaugeColor1, Freya::EnemyHPGaugeColor2)
self.bitmap.gradient_fill_rect(hp / 2, 0, hp / 2, bh, Freya::EnemyHPGaugeColor2, Freya::EnemyHPGaugeColor1)
elsif Freya::Gauge_Type == 3
hp = ((width - 2) * @battler.hp_rate).to_i
self.bitmap.gradient_fill_rect(1, 1, hp / 2, bh - 2, Freya::EnemyHPGaugeColor1, Freya::EnemyHPGaugeColor2)
self.bitmap.gradient_fill_rect((hp / 2) + 1, 1, hp / 2, bh - 2, Freya::EnemyHPGaugeColor2, Freya::EnemyHPGaugeColor1)
end
end
#--------------------------------------------------------------------------
# ● 更新画面
#--------------------------------------------------------------------------
def update
super
unless self.bitmap.nil?
self.x = @battler.screen_x - self.width / 2
self.y = @battler.screen_y
create_bitmap if @last_hp != @battler.hp
hide = $data_enemies[@battler.enemy_id].note.include?(Freya::HideGaugeText)
if @battler.hp == 0 or hide
self.opacity = 0
elsif @battler.hp > 0 && !hide
self.opacity = 255
end
end
end
end
#==============================================================================
# ■ Sprite_Battler
#------------------------------------------------------------------------------
# 　显示战斗者的精灵。根据 Game_Battler 类的实例自动变化。
#==============================================================================
class Sprite_Battler < Sprite_Base
#--------------------------------------------------------------------------
# ☆ 初始化对象
#--------------------------------------------------------------------------
alias initialize_freya_enemy_hp initialize
def initialize(viewport, battler = nil)
initialize_freya_enemy_hp(viewport, battler)
if @battler.is_a?(Game_Enemy)
@hp_gauge = Sprite_Battler_HP.new(viewport, battler)
end
end
#--------------------------------------------------------------------------
# ☆ 释放
#--------------------------------------------------------------------------
alias dispose_freya_enemy_hp dispose
def dispose
dispose_freya_enemy_hp
unless @hp_gauge.nil?
@hp_gauge.dispose
end
end
#--------------------------------------------------------------------------
# ☆ 更新画面
#--------------------------------------------------------------------------
alias update_freya_enemy_hp update
def update
update_freya_enemy_hp
@hp_gauge.update unless @hp_gauge.nil?
end
end

显示敌人血量，把上面两个脚本，添加到Main之上。
另外，提问题请清晰明确的表达你的需求。