Is butterfree a good Pokemon

It depends on who you are Using him on, for example if you're about to battle The Pewter City Gym Leader Brock you can have a lv. 12 or up Butterfree that knows Confusion, it can be REALLY Useful, which I need to do myself on Pokemon Red and you might be super careful on who you use him on because he is a flying and physic so dark, thunder, ice, and physcic would most likely faint him