Mario
At that time, video games were hard to make and Nintendo could not make Mario move without making his arms "disappear". Changing his clothes fixed it. They also did not have the space to give him a mouth or ears. They also could not make hair on his head. To fix this, the makers of the game gave Mario a moustache, sideburns, and a cap so it would not look like he was bald. Mario's creator, Shigeru Miyamoto, said that he gave Mario a cap,  because it is hard for him to draw hair. Mario is voiced by (his voice is made by) Charles Martinet, who also voices Luigi, Wario, Waluigi and other characters like Toadsworth.