The intro movie for 9-Volt, the Nintendo fanboy, features a number of Nintendo references:
9-Volt and 18-Volt then play the game, which plays sound effects from Super Mario Bros.
When they finish playing, 9-Volt plays his decks while his Nintendo consoles dance in the foreground. In order they are:
- Game Boy
- Nintendo DS
- Game Boy Advance
- Game Boy Advance SP
- Super Famicom
- Nintendo 64
There is a poster of Diskun (the mascot for the Famicom Disk System) in the background.
As in previous WarioWare games, 9-Volt's microgames are all themed on classic Nintendo games, systems and toys.
Super Mario Bros.
Based on Super Mario Bros. Collect the specified number of coins from the blocks and Mario will appear. Sometimes you have to grab coins from secret blocks.
Super Mario Bros. 
Based on Super Mario Bros. Poke the enemies to clear them off the screen to make Mario fly across the screen.
Based on Mario Paint. Scribble across the screen to fill in the white pictures.
Donkey Kong 3
Based on Donkey Kong 3. Blow into the microphone to make Donkey Kong hit the top of the screen.
The Legend of Zelda
Based on The Legend of Zelda and Zelda II: Adventure of Link. Tap the fairies that appear on the screen and Link appears. In the original The Legend of Zelda scenes, Link holds up an 8-bit Nintendo DS.
Based on Metroid. Keeping pulling Metroids off Samus to keep her energy above 0. This microgame replaces the Japan only "Famicom Detective Club" microgame in the non-Japanese versions.
Famicom Detective Club
Based on Famicom Detective Club. Tap the part of the investigation scene that differs from the scene shown on the top screen. This microgame is only in the Japanese version, and is replaced by the "Metroid" microgame in other versions.
Based on Balloon Fight. Pop the balloons of the enemy Balloon Fighters without popping the hero's balloon.
Based on Duck Hunt Game C. Tap the clay pigeons as they fly off into the distance.
Based on Hogan's Alley. Tap the gangsters to shoot them, but don't shoot the civilians.
Select the pixel that differs between the top and bottom screens to make a scene from an NES game appear:
Game & Watch Ball
Based on Ball. Move the doll's arms to catch the juggling balls. The game is erroneously named "Toss Up" in the PAL version, which was the title of an unofficial copy of the game by Mego/Time Out.
Game & Watch Flagman
Based on Flagman. Copy the Flagman's instructions before time runs out.
Game & Watch Lion
Based on Lion. Move the tamers up and down to keep the lions contained in the cage.
Game & Watch Oil Panic
Based on Oil Panic. Move the man so he catches all of the oil drops.
Clawing For More
Based on the Ultra Hand Nintendo toy. Pull the handle of the Ultra Hand to grab the ball and free the flying creatures:
Based on Hogan's Alley Game C. Tap the cans to land them all on the platforms without dropping any. Then two oil drums appear – shoot them repeatedly to make them break open, revealing a piece of classic Nintendo hardware:
- NES Advantage
- Power Pad
- Super Scope
- Game Boy
- Nintendo Entertainment System
- Virtual Boy
You can rack up a high score by juggling the cans against a wall for a while before landing them, and this changes the hardware that appears from the oil drums. To make the NES appear you have to get over 20,000 points, and to get the Virtual Boy you have to get over 30,000 points.
Notes on Button Masher & Famicom Microgames
In the Button Masher and Famicom microgames there are three titles you have to play, all based on real NES games:
In Jimmy T.'s "Chalk Full" microgame, you sometimes have to clean a drawing of Mario from the chalkboard.
In Jimmy T.'s "Power Chord" microgame, the rock star has a tattoo of Diskun on his upper arm. Diskun was the mascot for the Famicom Disk System.
Spin a Yarn
In Crygor's "Spin a Yarn" microgame, the third difficulty level has you unravelling a green vest. Hiding inside is Luigi from the Mario series, who jumps and makes an 'L' shape with his body.
You Scratch Mine
In Warioman's "You Scratch Mine" microgame, you have to scratch Wario's back. On the second difficulty level you also have to scratch Mario's, and on the third difficulty you have to scratch Toad's as well.
In Warioman's "Where's Wario" microgame, you have to spin a 3D ball to find the picture of Wario. On the hardest difficulty you will have to search through a bunch of pixellated characters to find the 8-bit style Wario sprite based on the arcade Mario Bros. Other characters include Luigi, Goombas and Koopa Troopas from the Mario series, all wearing Wario's yellow headgear.
In Mona's "Quite Puzzled" microgame, you have to solve a sliding puzzle by moving panels to match the top screen. One of the solutions shows a joker card with a merman on it. This was an actual Joker card from Nintendo's early days as a playing card manufacturer.
Wario's description for the "Hot Flash" microgame is as follows:
"Get me out of all these clothes! I'm sweating like a Goomba at a plumber parade!"
This is a reference to the Mario series.
Living Room Rally
In Crygor's boss stage "Living Room Rally", the remote control is the same red and gold design as the controller for the Japanese Famicom.
One of the toybox items that you unlock by playing the game is called Wario Paint. The game itself is a limited version of Mario Paint, and the toy icon is the Japanese boxart for the game, with Wario's nose where Mario used to be. In this mode you can select a drawing of a WarioWare character and colour them in with the colour bar along the top of the screen.
- The logo of the Games section is Mr. Game & Watch. He is leaping into the air with a cloud emnating from his backside.
- In the background of the second Toy Room is a picture of Mr. Game & Watch.
- In Wario's Microgame, "Big Bang", you are watched by a bunch of Mr. Game & Watches.
- In Mike's microgame, "Admiral Blowhard" it looks like the boat driver is Mr. Game & Watch.
When you complete a character's set, they go to the Hawt House. If you look on the top screen you can see a number of flying objects in the sky.
One of these flying objects is Satoru Iwata, the president of Nintendo.
As in earlier WarioWare games, during the credits you will see the Triforce from the Legend of Zelda series and the Gamecube "G" logo.