Super Mario Bros.: The Great Mission to Save Princess Peach! (1986):

Mario and Luigi find their way to the Mushroom Kingdom from a Warp Pipe after Princess Peach jumped out of their Famicom game. They then later found out that King Koopa had escaped the Famicom game too, and kidnapped Princess Peach. She must be saved by the two plumbers. In order to rescue her, the two must find the three powerups as follow: the Super Mushroom, the Fire Flower, and the Invincibility Star. Along the way, the brothers run into several enemies such as Goombas, Bloopers, Pirahna Plants, Lakitu, and much more. The duo arrives just in time to save Peach from a forced marriage to Bowser and defeat him by twirling Bowser by the tail and throwing him. Peach thanks Mario for saving her (as well as for saving a prince, who, it turns out, had been put under a spell by Bowser to be transformed into a blue dog) and the two return home, promising to visit again soon.