Previously, in the sonic boom fanfictions written by y .5:
For his 20th birthday, sonic received a medallion left to him by uncle chuck long ago, along with that he also left a video message.
"you have a brother a… separated at birth… your mother gave you to me… ind them… Protect the medallions not matter what!"
Prologue:
"Leave me alone knuckles!" yelled sonic.
"not until you calm down!" said knuckles.
Just after hearing the new that he has a brother, sonic tried to rush out of the shack, but knuckles managed to grab him before he got out.
"I can't just stay here! I need to find my brother!" said sonic.
"just think about it you idiot!" said shadow. "you don't have the smallest idea of where he is, you don't even know his name!"
"so what?! I just sit around and do nothing?!" yelled sonic.
"for once, I agree with shadow," Said amy. "before looking for your brother you should start with getting informations."
"… fine." Said sonic and knuckles let him go.
"So where do we start?" asked tails.
"I may I have an idea, but you're not gonna like this sticks." Said shadow. "We need to seek help from G.U.N."