Mario and Luigi: Superstar Saga
From Mariopedia
Mario and Luigi: Superstar Saga is a 2003 Mario title. It is one of the current six Mario role playing games. You play as Mario and Luigi (Luigi's second game to be a main character in since Luigi's Mansion) on an adventure 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.
[edit] Story
The game begins at Peach's castle where the Royal Beanbean ambassador (which was actually Fawful and Cackletta) was going to visit. Once there they stole Peach's voice (who was actually Birdo) and replaced it with an explosive one. Later Bowser came to the castle, and so a Toad ran to Mario's house while Luigi was drying clothes. Eventually he found him in the bathroom but quickly ran out in embarrasment. Then Mario wearing a bathrobe came out, jumped on Toad's head a couple of times and found out that something had happened to the Princess.
[edit] Battle Mechanics
Mario and Luigi: Superstar Saga used a style of battle mechanics that are similar to those in Paper Mario, however, with some more stats and perks. Each character has something similar to a speed stat. The one with the highest strikes first. Each character also has Attack, Defense, and one more stat called "Stache". Simply put, Stache is basically your character's luck of hitting a "Lucky" attack, which multiplies damage by two.