First of all, Here's the lore, "A teenager died of a seizure while playing a bootleg copy of "Super Mario Bros Wii". Instead of waking up in the afterlife, he is trapped in the game. He can never leave the game. So today, he remains trapped in the bootleg copy alone. Also, the "2009" on his hat represents the year he died".
Second of all, It ain't SMG4's old design