In a competition of speed between the Blue Blur and the Scarlet Speedster, it will take more than math and science to really comprehend their overall speed. However, taking all things we know into account, Flash would win a typical race against Sonic the Hedgehog and come out as the faster of the two.
As the current Flash in DC Comics, Wally West is one of the fastest men alive, easily able to outpace people like Superman and manage to keep up with people like Barry Allen, but a long time ago Wally admitted that the Reverse Flash is much faster than him.
His name is Superman, after all. Superman has been known to keep up with characters such as the Flash, who we know is way faster than Sonic.
The Flash was MUCH, MUCH faster than Sonic, but Sonic actually beat Flash in most categories, particularly Attack Potency and Durability. Boomstick: The gap in speed was huge, but Sonic's power and durability could certainly allow him to hold his own. At best, the Flash was Star level+ via the Infinite Mass Punch.
For sustained runs, Sonic clocks in at 767 miles per hour and his max speed reached is 186,000 miles per second, or in other words, the speed of light. Sonic can't sustain running at the speed of light, but he can regularly run faster than the speed of sound.
In a competition of speed between the Blue Blur and the Scarlet Speedster, it will take more than math and science to really comprehend their overall speed. However, taking all things we know into account, Flash would win a typical race against Sonic the Hedgehog and come out as the faster of the two.
Quick Answer: Barry Allen may be known for his superspeed, but just how fast can he run? Unfortunately for fans, it's not quite the speed of light. According to The Flash, Allen's top speed is Mach 3.3, or 2,532 miles per hour.
Yet Shadow is the most powerful character because of his lab origins. Gerald crafted him very carefully and made him practically immortal, so he could carry out his mission of healing without any major obstacles.
Superman is Superman. He is going to be on every list that ranks superheroes by speed, strength, durability, endurance, etc. You name it, he's on it. Of course, Superman is much, much faster than a regular old bullet.
The two heroes have raced several times since then, in the comics, cartoons and movies. As a general rule, the comics claim that The Flash is the faster hero, with Barry Allen, Wally West and even an octogenarian Jay Garrick having outrun Superman over the years.
As Sailor Moon, Usagi has many ways of countering Sonic's power-ups and super form. She could use the power of her Silver Crystal to seal Sonic and banish him out of existence or use her tiara to turn him into dust.
Background. Under normal conditions, at sea level, sound travels very fast, but much more slowly than light. Sound travels at about 344 m/s (761.2 mph). This is a bit faster than a civilian jet plane (a typical jet on its way from Chicago to New York travels at a peak speed of 550 mph).
He gets FASTER. While The Flash show puts Barry at physics-breaking speeds already, the comics introduce a Flash character that can outrun even him: Wally West. How fast is Wally West? Wally West can run at something called the “trans-time velocity”.
The ratio of Thor's reading speed to The Flash is 90 pages/hour/50 pages/hour = 9/5 times faster; approximately 2 times faster.
Superhuman Speed: The Black Flash can move at vast superhuman speeds, easily keeping up with Barry Allen, and surpassing the speed of light.
While Quicksilver is often thought of as the fastest of the Avengers, one hero fans know from the movies can actually outrace him when they need to. Many heroes possess enhanced speed, but Pietro Maximoff is generally considered Earth's fastest man (at least in Marvel Continuity).
Quicksilver. Wanda Maximoff's brother Pietro Maximoff gained his supersonic speed after being exposed to the power of an Infinity Stone. Right from his first appearance in Avengers: Age of Ultron, he's known to be the fastest superhuman with a perceptive mind and quick-witted motion.
Hercules / Zeus
While not cosmic (none of that on this list!), he can survive the vacuum of space and resist cosmic attacks. He ranks above Thor here because he's technically the stronger of the two. In fact, he is considered by many authorities to be the physically strongest character Marvel has ever created.
Doctor Ivo Robotnik, better known by his alias Doctor Eggman, is a human mad scientist and the main antagonist of the series. Debuting in the first game of the series, Sonic the Hedgehog, he was shown attempting to collect the Chaos Emeralds and turn all of the animals inhabiting the land into robots.
Doctor Eggman, under the "Robotnik" moniker, appeared as the main antagonist of two Sonic the Hedgehog animated television series that premiered in 1993.
No, the Archie comics were going to establish that Sonic was actually just a nickname - with his real name being Olgilvie. So yes, his real name is Olgilvie Maurice Hedgehog.
While the Dragon Ball hero is not often thought of as a speedster, it's safe to say that base form Goku would give the Flash a run for his money if it ever came down to a race between the two.
He is stated to be capable of exceeding light-speed (299,792,458 m/s), which could explain why he can go through the breaches between Earth-2 and Earth-1, and can move at speeds of Mach6-8, easily outmatching Barry's speed in their first fight.
Yes, under duress, under specific circumstances in the comics, the Flash does move fast, really fast, so fast he violates the laws of physics and moves at the speed of light or faster. He is protected (and so are we) from the effects of such relativistic movement in atmosphere.