Sonic the Hedgehog protagonist Sonic the Hedgehog, a blue hedgehog able to run at supersonic speeds, and recurring villain Dr. Eggman, an evil scientist whose ambition is to conquer the world. Among Sonic's many allies, the most well-known include: Miles "Tails" Prower, a twin-tailed, highly intelligent yellow fox who is Sonic's sidekick and best friend; Amy Rose, a pink hedgehog who is Sonic's self-proclaimed girlfriend and a hero in her own right; Knuckles the Echidna, a coolheaded red echidna who is the guardian of the Master Emerald; Shadow the Hedgehog, an anti-heroic doppelgänger of Sonic with a dark past; and Metal Sonic, a
Sonic the Hedgehog the exclusivity agreement. At the end of 2014, Sonic also returned as a fighter in both installments of "Super Smash Bros. for Nintendo 3DS and Wii U". Sonic was added as a playable character in the Lego video game, "Lego Dimensions", in November 2016; he is distributed via a "Level Pack" that includes an additional Sonic the Hedgehog-themed level and vehicles. Two "Sonic" games were revealed at the Sonic 25th Anniversary Event during San Diego Comic-Con 2016. The first game was "Sonic Mania", which emulates the gameplay and visuals of the original Sega Genesis games, and was released in August