Edit to CGMV Achievements Auto Add it To the Main Menu.

//Add this code at the bottom of CGMV Achievement plugin
//Achivements Menu
OverWrite_WindowMenuCommand = Window_MenuCommand.prototype.addOriginalCommands;
Window_MenuCommand.prototype.addOriginalCommands = function() {
	OverWrite_WindowMenuCommand.call(this);
	if(!Imported.YEP_MainMenuManager){
			this.addCommand("Achivements", 'achievement', true);
	}

};

OverWrite_createCommandWindow = Scene_Menu.prototype.createCommandWindow;
Scene_Menu.prototype.createCommandWindow = function() {
	OverWrite_createCommandWindow.call(this);
	this._commandWindow.setHandler('achievement',   this.commandAchievements.bind(this));
}

Scene_Menu.prototype.commandAchievements = function() {
    SceneManager.push(CGMV_Scene_Achievements);
};


//In Yanfly Main Menu Core
//Set the Symbol: achievement
//And Set Main Menu Bind: SceneManager.push(CGMV_Scene_Achievements)
//Make the sure the name is in quotation marks ie "Trophies" and you can use the enable and show however you want.