Found this out completely by accident once after my sister and I played some Mario.
I had the 2nd controller still plugged in, and while shooting the ducks I stepped on the controller and the ducks moved differently.
From the on, every time someone wanted to play duck hunt I would grab a second controller and make it harder for them.
Bonus knowledge: the original game works by a light-sensitive sensor in the blaster tip, and when you pull the trigger, the screen goes black and a white square appears whee the ducks were, in a specific order. If the game controller detects the light square, it counts as a "hit" on whatever duck was in frame. You can cheat by pointing the blaster at a white light and pulling the trigger. It will just go through them one by one as you squeeze, thinking the light is the duck square.
Younger me would have been blown away that reading would help me beat games in the future.
For the record, I have a small library now but when I first started playing NES-N64 games, I absolutely hated reading and never would have cracked open the manuals.