Who is knuckles in Sonic the Hedgehog

Hi! Knuckles is an ECHIDNA (you say it like ikidna) Knuckles does love searching for treasure and is super strong. Sonic's faster than him and he does encounter Rouge the Bat, who also loves treasure. But Rouge steals treasure instead of finding it. Knuckles was born on Angel Island. He and Sonic are both good friends and rivals at the same time. Weird, huh? I'll post more info later. See ya!

Knuckles is stoic and very good at kicking butt. NOT LITERALLY! He punches butt instead of kicking it.