The zapper goes into port 2, and a standard controller goes into port 1.
The game manual says that you can control the duck with the control pad (which is in player 1's controller port), which would usually be controlled by a second player. This isn't a secret to anyone who bothered to read the manual.
The game manual says that you can control the duck with the control pad (which is in player 1's controller port), which would usually be controlled by a second player. This isn't a secret to anyone who bothered to read the manual.
https://www.gamesdatabase.org/Media/SYSTEM/Nintendo_NES/manu...