Description taken directly from my y!gallery account:

May I present to you, Seppi, my unoriginal Shadow Clone. :D Not just a lookalike, but an actual clone of Shadow.

Now, for a short and pointless origin story:

Seppi started out as a generic Shadow Android. Lord knows why he was yellow instead of red. No one has been able to answer that one yet.

ONE FATEFUL DAY, WHILE GOING ON A TYPICAL INVASION OF A RANDOM CITY, LEAD BY DR. EGGMAN WITH A BUNCH OF OTHER SHADOWBOTS, AN UNKOWN INCIDENT OCCURED. This caused this particular android to malfunction. When it came to, the invasion was already thwarted and it remembered nothing. Upon wandering about the city, it saw various programs playing in televisions in store windows. It also noticed many strange people, breakdancing and talking trash about eachother's momma's. After seeing these programs and people, and learning a tad more about them, the android convinced itself that it was both a professional fashion designer, and on the side an urban rapper.

It adopted the name Seppi, and has since then been trying to take over the nation via a hip new urban fashion line, and rap songs dissing the government.

I was just following the trend. Anyone who takes this seriously needs to be cut. :(

I based the design off of 'Piss Shadow', the Shadow from the versus mode in the Shadow The Hedgehog game. Sorry, but I love the 'Piss Shadow' too much to let it go to waste. |D

Granted, I like the concept. I may use it as a gag character.