Turns out when bowsers out to take control of the mushroom kingdom he has a side gig this design imagines bowser as an oil brand in line for all the karting that goes on within the mushroom kingdom inspired by the mario kart series who knows what other establishments lie in the mushroom kingdom this t shirt is officially licensed and bears the nintendo seal of quality features t shirts are made from pre shrunk 100 cotton grey 90 cotton 10 polyester ethically sourced if yo