Actually, sonic=sound(thank you, Doctor). Sonic the Hedgehog is the speed of sound, but Rainbow Dash can preform Sonic Rainbooms, and those are based off of Sonic Booms, which is breaking the sound barrier, so sonic rainbooms=breaking the sound barrier, but it's made more fabulous with rainbows.
OMG to many bronies and girlys on here !! Sonic way fastser and@PikachuKetchum that's his real speed , it's not the shoes , but shadow , it's the shoes
Well Dashy actually is faster if Sonic did not have his awesome shoes. And RD can break the barrier which actually is what causes the rainboom, so actually rainbooms are real, just not possible yet.
Rainbow Dash obviously wins.
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