From US Gamer: “Team Sonic Racing allows you to pick a racer from a huge set of Sonic characters. Its likely that your favorites are here, though not everyone is available from the get-go. To help you get started with Team Sonic Racing, weve put together this Team Sonic Racing Characters Guide. Well provide a Team Sonic Racing Characters List, and detail how to unlock more characters in Team Sonic Racing.”
Source: N4G PC Team Sonic Racing Characters – Characters List, How to Unlock More Characters