Mii

Miis are the playable characters in Wii Sports & Wii Sports Resort. They're completely customizible in Mii Channel. & are even playable in other games as well. They all get their own skill level & records.

Sport Differences
Wii Sports The miis look different in each sport in Tennis they are normal & have tennis rackets. In Baseball when pitching they have baseball uniforms based on the color of shirt you gave it. Also they're with a glove. Batter is the same as pitcher without the glove but with a bat. Bowling is completely normal but with a bowling ball. Golf normal but with a golf club that could be changed throughout the game. Boxing shirtless with boxing gloves & everything else is normal.

Trivia

 * Mii stands for me.
 * Mii is the opposite saying of Wii.
 * Miis appearences are changed most in Boxing, 2nd Baseball, 3rd Golf, 4th Bowling 5th Tennis.
 * Miis are playable in other games like Mario Kart Wii etc.
 * Miis are one of the most common playable characters in Wii games.
 * Miis have shirts in every sport in Wii Sports except Boxing because in real Boxing people fight without shirts which it might actually be a rule in that sport
 * Fitness also appears in Wii Fit & Wii Fit+ but it appears in Wii Sports doesn't change appearences of the Miis just gives ages & is more minor than the other two games this feature in all 3 games only lets each Mii do it only once a day but in the other two games you can do dogs, cats, & babies as well but won't be in Mii Channel & the other 3 character types can't do training sessions but babies can do it at a certain age because they're appearence will change to a real mii also fitness is absent in Wii Sports Resort for an unknown reason.
 * They were suppose to be Mario characters said by Shigeru Miyamoto but were hoping for hand made characters thats how they were invented.