These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Adaptation Displacement: The game is actually based off of clay pigeon shooting gallery toys Nintendo made in the 60's and 70's. Perhaps one of the most potent instances of this trope - not only do most people not realize this game was based on a toy Nintendo used to produce, most people aren't even aware Nintendo produced toys in the first place.
The Scrappy: The dog in this game has to be Scrappy's offspring. It's the only explanation. ThisCollege Humor short sums up everyone's feeling towards the dog.
Take That, Scrappy!: In Vs. Duck Hunt, you can finally give the dog his just desserts by shooting him in the bonus stage. Sure, you're penalized for shooting him by being taken out of the bonus stage, but it still feels satisfying nonetheless.
Rescued from the Scrappy Heap: The unexpected appearance of the Dog in Super Smash Bros. for 3DS/Wii U as a playable character. He got an inventive moveset that involves references to many of the games that made use of the NES Zapper, which made people start to warm up to the guy after decades of scrappiness. It probably helps that people can finally vent their frustrations on him without being reprimanded.
Sequel Displacement: While Wild Gunman was the first Zapper game released, most American players tend to associate the peripheral with Duck Hunt due to its inclusion in console bundles alongside Super Mario Bros..