For the most part Mario looks the same as he did when he was creaed.
Mario's Hat
To not have the difficuilty of having Mario's hair move realisically,Miyamoto gave Mario a hat.At the Game Over Miyamoto admits"I cannot come up with hairstyles that good."
Mario's Mastache
Miyamoto gave Mario a mastache and an over sized nose so it would make the nose more noticable.
Mario's Overalls
Mario's overalls makes Mario's arms and arm movement easier to do,make and see says Miyamoto.
The Names
Donkey Kong
Simply put,Donkey Kong into"Stupid Gorilla"Miyamoto found the word moyte in a Japanese to English Dictionary meaning "stupid".He found the word Kong simply because he's a gorilla.
Luigi
The American Team provided the name "Luigi"to go along with "Mario".
Koopa's
The Koopa clan comes from"Kuppa"Bowser's Japanese Name.
Wario
Wario's name iiss a combination of "Mario" and "Warui".