Rpg Maker Developers Group

var _Game_Actor_ChangeExp = Game_Actor.prototype.changeExp;
    Game_Actor.prototype.changeExp = function(exp, show) {
        if (pluginParams.DisplayLevelUp < 0) {
            var display = false;
        } else if (pluginParams.DisplayLevelUp === 0) {
            var display = true;
        } else {
            var display = $gameSwitches.value(pluginParams.DisplayLevelUp);
        }
        if (display && this._feParams != undefined) {
            var prevFeParams = this._feParams.clone();
            _Game_Actor_ChangeExp.apply(this, arguments);
            var nextFeParams = this._feParams.clone();
            if (show) {
                this.displayFeParamsUp(prevFeParams, nextFeParams);
                // <--- insert command to show actor face graphics here
            }
        }
        else {
            _Game_Actor_ChangeExp.apply(this, arguments);
        }
    };