Luigi

Luigi is one of the four main protagonists of the three Mario animated series: The Super Mario Bros. Super Show, The Adventures of Super Mario Bros 3 and Super Mario World.

The Super Mario Bros. Super Show

 * The Bird! The Bird!
 * Butch Mario and the Luigi Kid
 * King Mario of Cramalot
 * Mario's Magic Carpet
 * Rolling Down the River
 * The Great Gladiator Gig
 * Mario and the Beanstalk
 * Love 'Em and Leave 'Em
 * The Great BMX Race
 * Two Plumbers and a Baby
 * Stars in Their Eyes
 * Pirates of Koopa
 * Robo Koopa
 * Count Koopula
 * Jungle Fever
 * Mario of the Deep
 * The Fire of Hercufleas
 * Mario Meets Koop-zilla
 * Mario and Joliet
 * Too Hot to Handle
 * Brooklyn Bound
 * The Adventures of Sherlock Mario
 * Hooded Robin and His Mario Men
 * Toad Warriors
 * The Pied Koopa
 * Bad Rap
 * On Her Majesty's Sewer Service
 * Mario and the Red Baron Koopa
 * Mighty McMario and the Pot of Gold
 * Do You Princess Toadstool Take This Koopa…?
 * The Mark of Zero
 * 20,000 Koopas Under the Sea
 * The Koopas Are Coming! The Koopas Are Coming!
 * Koopenstein (Baby Mario Love / Koopenstein
 * Quest for Pizza
 * The Unzappables
 * The Trojan Koopa
 * Karate Koopa
 * Elvin Lives
 * Koopa Klaus
 * The Ten Koopmandments
 * The Provolone Ranger
 * The Great Gold Coin Rush
 * Mario of the Apes
 * Crocodile Mario
 * Plumbers Academy
 * Princess, I Shrunk the Mario Brothers
 * Flatbush Koopa
 * Raiders of the Lost Mushroom
 * Star Koopa
 * Escape from Koopatraz
 * Little Red Riding Princess

The Adventures of Super Mario Bros 3

 * Sneaky Lying Cheating Giant Ninja Koopas
 * Reptiles in the Rose Garden
 * Reign Storm
 * Toddler Terrors of Time Travel
 * Mind Your Mummy Mommy, Mario
 * The Beauty of Kootie
 * A Toadally Magical Adventure
 * Misadventures in Babysitting
 * Oh, Brother!
 * Misadventure of Mighty Plumber
 * Princess Toadstool for President
 * Never Koop a Koopa
 * Dadzilla
 * Tag Team Trouble
 * Do the Koopa
 * Kootie Pie Rocks
 * Crimes R Us
 * Life's Ruff
 * Up, Up, and a Koopa
 * 7 Continents for 7 Koopas
 * Mush-Rumors
 * The Ugly Mermaid
 * True Colors
 * Recycled Koopa
 * The Venice Menace
 * Super Koopa

Super Mario World

 * The Wheel Thing
 * Fire Sale
 * Send in the Clown
 * Ghosts 'R' Us
 * King Scoopa Koopa
 * Born to Ride
 * Party Line
 * Gopher Bash
 * Rock TV
 * The Yoshi Shuffle
 * The Night Before Cave Christmas
 * A Little Learning
 * Mama Luigi

Trivia

 * He is the only character in the series to appear in all episodes without exception.