Super Mario Land 2: 6 Golden Coins is a platforming game for the Game Boy and the sequel to Super Mario Land. It also marks the debut of Mario's self-proclaimed arch rival Wario, who would later become a recurring character in the Mario series as well as a protagonist in his own series. The game features new graphics, power-ups, challenges, and a completely original storyline.

Danger! Danger! While I was away crusading against the mystery alien Tatanga in Sarasa Land, an evil creep took over my castle and put the people of Mario Land under his control with a magic spell. This intruder goes by the name of Wario. He mimics my appearance, and has tried to steal my castle many times. It seems he has succeeded this time. Wario has scattered the 6 Golden Coins from my castle all over Mario Land. These Golden Coins are guarded by those under Wario's spell. Without these coins, we can't get into the castle to deal with Wario. We must collect the 6 coins, attack Wario in the castle, and save everybody! It’s time to set out on our mission!!