Mario and Luigi: Superstar Saga is a 2003 mario title. It is one of the current six mario RPG games. You play as Mario and Luigi(luigi's second game to be a main character in since Luigi's Mansion)on an aventure to save Princess Peach from the clutches of the evil Cackletta and her evil assistant Fawful. This game is took place in the Beanbean Kingdom, a neighboring kingdom visited frequently by the members of the mushroom kingdom. To shortly explain this game, it is Paper Mario, add Luigi as a playable character, change the story and setting and BAM, you have Mario and Luigi: Superstar Saga.
The game begins at Peach's castle where the Royal Beanbean ambassador was going to visit.