Wario has put an evil spell over Mario Land while Mario was away in Sarasaland, renaming the area Warioland. The inhabitants are now brainwashed into thinking that Wario is their master, and Mario is their enemy. Wario's motive behind this sudden attack was to take control of Mario's castle in order to have a palace of his own. To stop Wario, Mario must find the 6 Golden Coins guarded by the Bosses throughout Mario Land to gain access to his castle. Mario eventually infiltrates Wario's castle, and fights him. Mario, inside his stolen castle and defeats him, thus reclaiming his castle and freeing Mario Land from Wario's hypnotic spell.
