Mario is Nintendo's mascot (the face of the company). Mario's rival was Sega's mascot, Sonic the Hedgehog, who was first seen in 1991. The two mascots were trying to get more people to buy their games for years until 2001 when "Sonic Adventure 2: Battle" was released on a Nintendo machine since Sega games started to be released on game machines that were not made by Sega. Mario and Sonic appeared together in a sports game, "Mario & Sonic at the Olympic Games", and again in "Super Smash Bros. Brawl" as well as "Super Smash Bros. for Nintendo 3DS and Wii U". To this day, Mario and Sonic continue to appear together in Nintendo’s spinoff titles such as Super Smash Bros. Ultimate.