Mii

"This game's mine!"

- Mii

Miis are the digital avatars that appear in the Mii Plaza from one of the Wii Channels. Miis are based off of human beings and players can design what their Miis look like so then the player can use them. Nintendo's head developer, Shigeru Miyamoto had wanted to create Miis since the NES, and kept trying to create them with every system Nintendo could such as the Nintendo 64DD add-on and Nintendo DS. Players can start from scratch or make an existing Mii into Miis. Only 100 Miis fit in one Wii, while the Wii Remote itself can hold 10 Miis.

WarioWare: Smooth Moves
Miis have first appeared with Wario in WarioWare: Smooth Moves. In this game, the Miis star in multiplayer mode and in a few of the microgames. Players must also use Miis to personalize their own files. One of the multiplayer modes starring the Miis is very similar to the mini-game Balloon Bang.

Mario Party 8
In Mario Party 8 they are playable characters in the Extra Zone and are sometimes seen in the background of mini-games. The Miis in this game, however, wear overalls, gloves, and shoes like the Mario Bros. Miis are also available to personalize players' files.

Mario & Sonic at the Olympic Games
In Mario & Sonic at the Olympic Games, Miis are playable characters, just as capable of competing as the characters from the Mario and Sonic series. Their stats are all five out of ten. In this game, the Miis have no voice and are simply called "Mii" during events.

Mario Kart Wii
In Mario Kart Wii, Miis first appear as background characters found in various race courses. They also appear in posters and other signs, as seen in Coconut Mall. Later in the game, Miis can be unlocked as playable characters. There are two outfits available for Miis and both outfits have to be unlocked. The first one (Outfit A) is a plain racing suit of the player Mii's favorite color. The other (Outfit B) depends on the gender of the Mii. If the Mii is male, he receives a Mario outfit of his color, but if the Mii is female, she receives a Peach outfit of her color.

A kart color may also change depending on the Mii's gender (blue for males, pink for females). Miis receive generic voices in Mario Kart Wii, depending on their weight class. The light Miis have high-pitched, childish voices, while heavy Miis have deeper mature voices. The weight class for the Mii driver depends on the size the Mii is in the Mii Channel. Notably, when the player plays as a Mii, statues and pictures in various courses, such as Moonview Highway, Coconut Mall, and Daisy Circuit, will replace the character heads with that of Mii heads, consisting of the Miis saved on a players Wii console.

A Mii can be either a large, medium, or lightweight character, depending on its height and weight. In Mario Kart Wii, even if a Mii is really tall, but doesn't weigh a lot, it will still be categorized as a large character, unless it's skinny, where it qualifies as medium.

Dr. Mario & Germ Buster
In Dr. Mario & Germ Buster, Miis are able to replace Dr. Mario as the playable character. Here they must maneuver Megavitamins tossed into a glass jar in order to destroy the Viruses. In order for a virus to be destroyed, it must be connected to at least one Megavitamin of the same color. Unlike Doctor Mario, Miis speak. Miis can tell the player how many minutes have passed and how many capsules they've thrown.

Mario Super Sluggers
Miis are playable characters in the game Mario Super Sluggers. Mii's can't be chosen as captains, but up to 8 Mii's can be used. Miis in Mario Super Sluggers have wooden bodies with painted on baseball uniforms. Miis have 6/10 on all stats and chemistry to characters matching their colors, example. Red has chemistry with Mario and green has chemistry with Luigi and pink for Peach etc. Also Miis of the same color have chemistry.

It should also be noted that all male Miis are right-handed batters, while the female Miis are left-handed batters in this game. Both genders are right-handed fielders though. For some reason, they don't speak in the game. (probably due to the fact they are not alive, but animated dolls)

Mario & Sonic at the Olympic Winter Games
Miis return in Mario & Sonic at the Olympic Winter Games. This time, Miis can be customized to wear different clothes and accessories. Unlike the last game, the stats differ depending on the gear. They can even wear different costumes of the playable characters in the game. Some of the bosses from Festival Mode also give off their costumes once defeated.

Non-Playable Appearances
Miis also appear in games such as Donkey Kong Barrel Blast, and Mario Strikers Charged Football to represent the player, similar to an avatar. In Super Mario Galaxy, players can personalize their files with Miis. This has also been done with other non-Mario related games. In Super Smash Bros. Brawl, the player can use their Mii on Wi-fi to represent themselves.

Check Mii Out Channel/Mii Contest Channel
One of the channels in the Nintendo Wii is the Check Mii Out Channel (or the Mii contest channel), where Nintendo holds contests to see who can create the Mii that looks the most like a certain person, for example a few contests had players to create Miis that looked like the Tooth Fairy, or another that even had players to create a Mii of a Gingerbread Man. Some of the contests have been Mario related. Here is a list of them:
 * Mario, without his hat, was the first contests in the Check Mii Out Channel.
 * Luigi, without his hat, was another later contest.
 * Another contest had players create Princess Peach.
 * A recent contest was "Someone like Mario, but a little different".
 * One contest had Bee Mario

Trivia

 * Miis receive voices for the first time in Mario Kart Wii, not counting small background noises that they first made in Wii Play's Shooting Range event.