Harvey Guillén As S.M.B.P.R.C (Super Mario Bros Plumbing Robot Computer)
Maurice LaMarche As Professor Giuseppe
Kevin Afghani As Mario & Luigi's Dad
Rino Romano As Uncle Tony
John DiMaggio As Uncle Arthur
Sebastian Maniscalco As Foreman Spike
John Stocker As Salvador Drainotto
Jim Cummings As Sergeant Kooperman (Mario & Luigi's Boss)
Cast[]
Peter Cullen as Mario/Mario Man & The Flab Boys
Richard Yearwood as Luigi/Bubble Guy, Gramps, Mushroom person, Pronto, Romano's father, Secret Agent N, & Waldo the Wizard
Kate Soucie As Princess Peach/Rainbow Princess
Jim Cummings As Bowser, Dr. T. Garden, Tryclyde, Junior's Dad, Calamity Clam, Talking Head, Crocodile 1, Crocodile 2, Outback mayor, Hooded Robin & Sergeant Kooperman.
Jeff Bennett as Bowser Jr.
Will Ferrell As Koopa Kid
Joe Zieja As Kamek, & White Yoshi.
Dee Bradley Baker As Koopa Troopa & Poochy/Power Pup
Tress Macnellie As Starlow
Roger Craig Smith As Prince Haru & Pokey
Juanes As Mushroom Hermit
Grace Newton As Kibidango/Kangaroo Kibidango & Stuffwell
Rob Paulson As Wiggler, & Red Toad.
Bill Fagerbakke As Goomba & Patrick (Morton) Koopa.
Joanne Vannicola As Monty Mole
Mike Bell As Santa Toad.
Rodger Bumpass As Chef Toad
Paul Tibbitt As The Umbrella Toad.
Derek Drymon As The Umbrella Toad (Singing Voice)
Danny Burstein as Wario & Burstein (Roy) Koopa.
Tyler Alexander Mann As Waluigi.
John Stocker As Toad/Fire Toad, Snifit, Mr. Mayor, Salvador Drainotto, Fryguy, Beezo, Mouser, & Oogtar