Party member

Mario has had many partners during all his adventures. They are all helpful to him. Luigi also gets partners in Paper Mario: The Thousand Year Door.

Super Mario RPG: Legend of the Seven Stars Partners

 * Princess Toadstool
 * Bowser
 * Geno
 * Mallow

Paper Mario Partners

 * Goombario
 * Kooper
 * Bombette
 * Parakarry
 * Lady Bow
 * Watt
 * Sushie
 * Lakilester

Paper Mario: The Thousand Year Door Partners

 * Goombella
 * Koops
 * Flurrie
 * Yoshi Kid
 * Vivian
 * Bobbery
 * Ms. Mowz

Mario & Luigi Characters

 * Mario
 * Luigi
 * Baby Mario
 * Baby Luigi

Paper Luigi Partners

 * Blooey
 * Jerry
 * Torque
 * Hayzee
 * Screamy