The Masked Man in Mother 3 after the he unveils himself to be the protagonist's long lost brainwashed half-robotic older brother.
Then, from the same game, there is also the "Whatever" enemy. When they first see the protagonist, they make a heart emoticon and just rush over at him. However, they don't begin a battle right away, they actually just go in front of you. If you run into them, however, then the battle starts, but if you don't, then you'll just get stuck with a bunch of Whatevers blocking the way.