Sonic's Horse Racing is a racing game for the Wii U,Xbox One, and the PS4. Everypne wears princess dresses, even the guys.
Dr.Eggman is holding a horse racing contest, and whoever wins it gets the Chaos Emeralds. Dr.Eggman entered a bunch of his robots in the race so he can win. Sonic and friends hear about this. They wear princess suits because it is National Princess Suit Day. Sonic enters the race. He beats all the robots and Dr.Eggman,and he gets the Chaos Emeralds so Dr.Eggman doesn't rule the world.