Mario is a fictional Video Game character created by Shigeru Miyamoto. Starting in the early 1980's, Mario's first video game appearance was in the Arcade game, Donkey Kong. During the time of Donkey Kong, Mario's name wasn't even Mario, it was Jumpman. Also, the few games after Donkey Kong, Mario (Jumpman) was the antagonist.
Mario's personality can be mixed depending on what is going on. Like in Super Mario Galaxy, when Mario enters a Bowser batlle, you can see that Mario looks mad. But when he collects a Power Star, it is shown that Mario is happy and excited that he won. Also, if something happens to Mario, it may be shown that he may not like it. Like in SMB3, when Mario turns into a statue, he has a blank experssion.
Mario's cap is a very important part of his clothing. He wears it in most games (With the exclusion of the Dr. Mario games) In Super Mario Sunshine, when Mario loses his cap, he will gradually take damage. A funny trick is talk to an NPC until your health meter runs out. It will make it look as if the NPC killed you. In Super Mario 64 DS, a Toad reveals that Mario's cap is special, and without it, only Bad Luck will come upon him. In Luigi's Mansion, Mario's Cap is one of the 5 items that Luigi must bring to Madame Clairvoya. In New Super Mario Bros. Wii, if Mario gains 99 Lives, his hat will be taken off "In honor of all your hard work."
Mario's Gloves are another part of all his clothing. He is rarely seen without them (Except for Donkey Kong and Donkey Kong Jr., and when he is a baby.) This part is not very important. In Luigi's Mansion, when Luigi brings Mario's glove to Madame Clairvoya, she will say that it is extremely sweaty. In the Super Smash Bros. Series, Mario's glove bares a striking resemblence to Master Hand.
Mario's long time arch nemesis and main enemy. No matter how many times Mario has defeated Bowser, almost 100 times, he never seems to give up. He also has a love interest with Princess Peach, and always fighting Mario for her. There are also some scenes where Bowser wants to save Mario from obstacles and enemies, as shown in Mario Super Sluggers. Bowser jumps in front of a Bullet Bill to avoid it hitting Mario. Probably to be able to destroy Mario himself.
During Mario's first few games, Mario was trying to destroy DK, starting a short-lived rivalry. But as the Mario series went on, Mario and Donkey Kong started to become friends, and a friendly, yet competitive rivalry between the two of them, as of the present.
Mario's younger, twin brother. They usually work together, Luigi as the second protagonist
Mario steps on Luigi's foot in Mario Power Tennis
and hero. Mario and Luigi maintain a brotherly love between each other. They are usually paired up together in sports titles and spin-offs. Luigi looks up to Mario as a positive role-model, and also feels jealous of Mario, due to the fact that Mario has been on many more adventures than Luigi.
They are usually stated as very good friends. Mario has saved Daisy from the evil clutches of Tatanga in Super Mario Land. In later games, Mario and Daisy have been called "Nice Couple". In the Mario Baseball series, they don't share chemistry, as Luigi and Peach don't.
She has been Mario's close friend ever since they were children. Mario always saves Peach, usually receiving a cake that Peach had made herself, or a kiss upon her returning. Princess Peach and Mario are considered to be in a romantic relationship. According to the European Mario website, it is confirmed that Peach is Mario's girlfriend. In Mario Kart: Double Dash!!, Mario and Peach are the secret staff ghosts on Rainbow Road. In Super Mario Galaxy, Rosalina refers to Princess Peach as Mario's "Special One".
She has befriended Mario during the events of Super Mario Galaxy and very little during Super Mario Galaxy 2. She had trusted Mario to return the Comet Observatory back to a Starship, and she gave him help to defeat Bowser.