I want to know the answer to the following question:
What did the Legend of Zelda require in certain instances to kill enemies?
All the background I'm provided with is that "Also in contrast to the Famicom, the controllers included with the NES were identical to each other—the second controller lacked the microphone that was present on the Famicom model and possessed the same START and SELECT buttons as the primary controller.". Is that enough to answer the question?
Answer: no