Super Mario Bros and Duck HuntSUPER MARIO BROS. One day the kingdom of the peaceful mushroom people was invaded by the Koopa, a tribe of turtles famous for their black magic. The quiet, peace loving Mushroom People were turned into mere stones, bricks and even field horsehair plants, and the Mushroom Kingdom fell into ruin. The only one who can undo the magic spell on the Mushroom People and return their normal selves is the Princess Toadstool, the daughter of the Mushroom King.