He is basically a competing Plumbing service out to take out Mario, and Luigis small shop. But he also gets money from Bowser for his services outside of plumbing (Hiring Goons). Wario, however, has a different agenda for bowser. He is slowly letting his goons work their way up to the top so that he can make his move and take over bowsers kingdom. All the while trying to stomp marios business to the ground!