It depends on the game, general fan concensus is that the best sonic Games have multiple characters that play Similiarly to sonic with only one or two skills that set them apart.
Yes, but they will take it down unless you state that the sonic characters that are in the game are property of SEGA.
Sonic the Hedgehog is the name of the official characters and series whereas Sonic Boom the Hedgehog is most likely the name of a fan character.
The reason for this is that Sonic is one of the most famous video characters there is, his animal, yet slight human-like style makes it more interesting for fan-characters to be based on him, also Sonic's abilities usually encourage the creator of the fan-character to have their own story line and abilities.
YouTube, DeviantArt, and other places where you can display images and/or videos.
Photobucket, DeviantART and Flickr are examples of picture hosting websites.
as far of offical sonic characters, purity is not one of them. purity would be a fan character. (not real characters that people create for there own enjoyment, but not by SEGA)
Anything that's not in the Sonic Games, Comics, and Cartoons.
Concept: Mobius, Sonic Wrecks, Shadow of a hedgehog, and Sonic SpeedZone are useful sites for information on Sonic and downloadables, Sonic Speedzone has Sonic TV show episodes and Sonic Wrecks and Shadow of a Hedgehog have good music downloadables and Concept: Mobius has useful information on Sonic characters and locations within the Sonic world.
Usually known as a cross breed between a hedgehog and a fox, commonly used as a fancharacter species for sonic fan characters.
New Mario characters: Donkey Kong, Bowser Jr. New Sonic characters: Metal Sonic, Silver
Sonic and Blaze