Sonic Arena
Buy
Could be interesting
Daris Venture is a half-Saturn/Advance-style fan-made game that will tell you an alternate history of Mobius that ended not in the best way for the Robotnik Empire.
AzuFight: Taisen Shiyo is a doujin fighting game based on the Azumanga Daioh anime and manga series. Not to be confused with Azumanga The Fighter T-Style, though possibly meant to serve as a sequel or expansion.
A flash-based Sonic fighting fangame based on Super Smash Bros. franchise. It has some characters from Sonic franchise and a campagin mode.
Dr. Robotnik's Badnik Quarrel is an ARENA BRAWLER in which up to eight teams battle against each other with characters from the Sonic The Hedgehog series. Each team is given four 'emeralds' that represent badniks that will fight in an arena during each round. You must win rounds to score points for your team, which are used to purchase upgrades or randomize your badniks so that they have higher strength or health stats, and sometimes gain special fighting abilities that give them a distinct advantage over other monsters in the arena. There are also special mini games between rounds where players on each team must fight each other.
Full fledged Sonic Fighting game - Super Sonic Battle. Developed to celebrate the 20th Anniversary of the GBA title Sonic Battle!