My brother and I recently decided to beat Zelda II on NES. When we finally reached the end screen, after nearly three months of zero-cheating torture, we had all the spells, all items, all magic containers, all heart containers, level 8 on everything, had fully beaten all temples (meaning they turn into mountains so you cannot re-enter them)... but still somehow four keys left.
Even after we had found the "Magic Key", which according to the cryptic manual "can open several of the locked doors" (in contrast to the original game where it just meant "unlimited keys"), the game kept giving us several normal keys in the last two temples, which never went anywhere. There were four nonexistent doors left for the keys to open. Just not present anywhere. And we made careful maps to really scan through each temple.
Isn't the Magic Key required to even get anywhere in the second-to-last temple? We had zero keys for the longest time until we found that key and could proceed into that temple's first (and only) locked door... only to get more keys inside. But no doors anywhere to actually use the keys. Not even ones that open with the Magic Key. No doors period.
Also worth to mention is that, unlike the first game, Zelda II has no way to purchase keys. They are always found or rewarded for beating a mini-boss, and appear to be presented as very important objects.
Also, a person in the game literally tells you to "use the keys in the same palace as where you find them". I wonder what that means since you appear to have no choice?
Am I fundamentally confused about what it means when a temple turns into a mountain tile (and prevent you from re-entering)? Does it perhaps only signify that you beat the boss and got out of the temple, but there are no guarantees that you found all items/secrets inside?
How could we have four keys left?