Storyline

After the Mushroom Kingdom raises its tax rate, Wario (who is a Libertarian) decides he has had enough and establishes the sovereign micronation of Wario Land a few miles off of the coast of the Mushroom Kingdom. However, the Mushroom Kingdom IRS decides to collect its "legally-owned" dues anyway — violating the NAP — so Wario must stage a counterattack in order to make sure that no-one else will have to suffer the indignity of having their child-slave-labor money being stolen. Walk, jump, dash, throw, ground pound, and squat-walk across the country — collecting tons of gold while you're at it — and show the IRS who's the boss.