Alex Kidd is the main protagonist of the series of the same name, first appearing in the 1986 platforming title Alex Kidd in Miracle World. That game was intended to be Sega's answer to Nintendo's Super Mario series, and as such Alex can be seen as Sega's counterpart to Mario. Similarly, Alex was Sega's previous mascot until he was eventually replaced by Sonic the Hedgehog.
Hailing from the Planet Aries, Alex has been trained in the martial art of Shellcore, which enables one to alter the size and toughness of their hands through sheer willpower, allowing one to break objects as strong as solid rock with their fists alone. While he initially lived alone as an orphan on Mount Eternal, he learned from a dying man that he is in fact a lost member of the Radaxian Royal Family, son of King Sander Radaxian and brother of Prince Igul.
Alex Kidd can be unlocked by scoring 15 goals playing as Sonic the Hedgehog.