No matter what, whether bulking, cutting or just trying to live a healthy lifestyle, you should get 20% of your calories from fat and the fats you do get, you should try to make monounsaturated?
I wouldn't say there is any rule in concrete - but yeh, 20% of calories, at the very least, ought to come from healthy fats. It doesn't just have to be monounsaturated - polyunsaturated fat is also great for your cholesterol levels.
What you want to cut back on are the saturated fats - and simply avoid trans fat altogether.