Quote Originally Posted by Imzogelmo View Post
I'm fairly certain teleporting Wizzrobes on the NES can appear in doorways and walls. The gliding ones can definitely get you in the door too.
I'm not sure about Gleeok heads, but I wouldn't be too surprised to find that they can get you too. Then there's Patra, they can wrap around the screen and get you from the other side.
No enemies ever entered walls or doorways in LoZ. Honestly I thought the change had something to do with the rules like being able to attack at the edge of the screen.