Duck Hunt (character)

Duck Hunt (known as Duck Hunt Duo in Europe) is the name that refers to both the playable dog and duck fighters in Super Smash Bros. for Nintendo 3DS / Wii U. They are the two titular non-playable characters from the NES video game they are named after, Duck Hunt. The original game's premise was to use the NES Zapper light gun accessory to shoot down ducks, and the dog would retrieve them and hold them up to award the player points. If the player missed his shot, the dog would laugh.

In the fourth installment of Super Smash Bros., they both act as one singular playable fighter, with the duck riding on the dog's back throughout the entirety of matches. Besides premiering as playable characters in Super Smash Bros. for Nintendo 3DS / Wii U, the duo has also made other crossover guest appearances with the Mario series in other instances, mainly in the WarioWare series.

Super Mario Bros.
Though not appearing in the game itself, Super Mario Bros. was re-released multiple times, bundled with other games within the same cartridge. Two releases included a copy of Duck Hunt: 2-in-1 Super Mario Bros./Duck Hunt and 3-in-1 Super Mario Bros./Duck Hunt/World Class Track Meet.

WarioWare, Inc.: Mega Microgame$!
A microgame called Duck Hunt appears, and has overall the same gameplay as the original NES game, this time having the player uses the Nintendo GameCube controller to shoot ducks.

WarioWare: Twisted!
A Duck Hunt microgame similar to the one from WarioWare, Inc.: Mega Microgame$! appears in WarioWare: Twisted!, this time using the Game Boy Advance cartridge's tilt sensor to aim.

WarioWare: D.I.Y. Showcase
The Duck Hunt microgame returns in the WiiWare game WarioWare: D.I.Y. Showcase, and utilizes the Wii Remote's motion controls.

Super Smash Bros. for Nintendo 3DS / Wii U
The Duck Hunt Duo appears as unlockable playable characters in Super Smash Bros. for Nintendo 3DS / Wii U. The dog and duck fight together as singular fighters, unlike the Ice Climbers where Nana was computer-controlled. Their moves include throwing a can (from the Nintendo Entertainment System game, Hogan's Alley) and the duck flying while holding the dog. Their Final Smash is a shootout of characters from some NES games that have used the Zapper Gun: Wild Gunman, Hogan's Alley and Duck Hunt.

Tetris DS
Gameplay of Duck Hunt can be seen on the Nintendo DS's top screen in stage 19 of Standard Marathon mode in Tetris DS, where the dog and duck make a cameo. The dog also appears as a sprite on the touch screen during this stage.

Trivia

 * The Duck Hunt microgame in WarioWare: Touched! bears the Duck Hunt title, but instead of featuring the iconic dog and ducks, it uses clay pigeons.