i learned about these charecters in this video

Sonic's Big Break

hedgehogs nemises he pretty much hates all of them but he use to like Shadow

this is Vecter the crocodile use to be sonic friend 

hedgehogs friend a echidna thats what he is.friend of sonic

still not a hedgehog a hedgehogs girlfriend thow her name is Amy Rose she loves sonic

not a hedgehog but hes a hedgehogs friend of a hedgehog his name is sonic.the name of this guy is tails tails the fox fox is my middle name it really is