Sonic Brawl is a fighting game released for Wii U in 2015. It's considered a sequel to Sonic the Fighters/Sonic Championship. It was made for Crim's Fourth Challenge
After the Death Egg II was destroyed, Sonic and Tails head back and give the holders of the Chaos Emeralds them back. Later, Sonic gets news that Metal Sonic and Eggman have made a new Death Egg and are planning to blow up the world. Because the Lunar Fox still can only carry one passenger, Sonic calls some of his friends and rivals over so they can decide who will get in the Lunar Fox and get the Chaos Emeralds back.