Sonic world 1

Intro character's: sonic(a blue hedgehog,usually always happy) tails(a yellow fox,smart and is always making new stuff) knuckles(a red idk what animal hes ment to be,hes an echidna(the last echidna...i think)he's strong) shadow:(a black hedgehog who's always cold and distant) (add more if you want) you(choose your name and everyting else)you are the last of your kind(your race was wiped out by the echidna's)so you are rude to knuckles,and want to kill him