VIDEOS:
Sonic the Hedgehog
Why else is he called "Sonic"? Although his top speed has never been canonically established, he's shown to be capable of breaking the sound barrier whenever he kicks into high gear. One of his official character profiles even establishes that he's capable of reaching lightspeed.
Example of:
The Speedster
Example of:
The SpeedsterExample of:
The SpeedsterExample of:
The Speedster