"Defective Gadgetry" is the fortieth live-action segment of The Super Mario Bros. Super Show!. It is paired with the The Legend of Zelda cartoon episode "Underworld Connections."

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Animated characters	Protagonists	Luigi • Mario • Princess Toadstool • Toad
	Antagonists	King Koopa • Mouser • Tryclyde
	Other characters	Albatoss • Angry Sun • Autobomb • Beezo • Bingo • Birdo • Birdoroo • Black Pit Bob-Omb • Bloober • Bob-Omb • Bomb Net • Brutius Maximus Grouchimus • Bullet Bill • Bunsen • Butterfingers • Calamity Clam • Captain Abidab • Captain Clump • Cave People • Cheepy • Clawgrip • Cowazaurus • Cobrat • Dealin' Delbert • Dr. Nerdnick • Dr. Sheldon • Dr. T. Garden • Elves • Elvin Parsley • Fire God • Flab Boys • Flaky • Flurry • Fryguy • Genie • George Washingtoad • Giant Birdo • Goomba • Goomba (zombie) • Goomba Biker Gang • Goomba Mummy • Goosey • Gramma Toadstool • Gramps • Grunt • Hammer Brother • Harry • Hercufleas • Herlock Solmes • Hooded Robin • Hoopster • Koopa Paratroopa • Koopa Troopa • Lakitu • Mousersaurus Rex • Ninji • Ostro • Phanto • Pidgit • Indiana Joe • James Blond • Joliet • Joliet's father • June and Ward • Killer Kitty of the Kaskervilles • King James • King Neptune • Mark Twang • Mayor Fettuccine • Mermushrooms • Mervin the Magician • Misaki • Mouth of the River • Mr. President • Mr. Mayor • Mugga • Murphy • Mushroom People • Mushroom Rebel • Obi-Wan Toadi • Outback mayor • Patches • Pine • Piranha Plant • Pokey • Porcupo • Prince Pompadour • Pronto • Quirks • Robo Shyguy • Robo Koopa • Romano • Romano's father • Royal Cow • Salvador Drainado • Sam Shalam • Santa Claus • Scooter • Secret Agent N • Shyguy • Shyguy Lion • Slammer • Snifit • Space Troopa • Spark • Spider • Spiny • Spiny Egg • State Troopa • Stool Pigeon • Stormtroopa • Super Troopa • The Three Mushrooms • Thunder Birdo • Trouter • Tweeter • Tweeter Bat • Waldo the Wizard • Wereturtle • Whale • Zero
Live-action characters	Characters	Clog • CooKoo Bird • Edison • Luigi • Mario • Ratagator
	Guests	Alligator Dundee • Angelica • Aunt Luigeena • Brian Bonsall • Captain Lou Albano • Cher • Count Zoltan Dracula • Cyndi Lauper • David Horowitz • Doc Freud • Dr. Frankenstein • Dr. Sigmund Fruitcake • Dr. Toby • E.C. • Einstein • Ellie Mae • Elvira • Elvis Presley • Ernie Hudson • Exterminator • Frankenstein's Monster • Fred Van Winkle • George Washington • Grandma Mario • HAL 9001 • Harry Blackstone Jr. • Howard Stevens • Ike • Imperial Poobah • Inspector Gadget • Inspector Klean • Jim Lange • Jodie • Kenneth • Little Robert • Liz • Luigeena • Luigi's girlfriend • Lyle Alzado • Mad Donna • Madam AGoGo • Magic Johnson • Mama Mario • Marianne • Marilyn • Mario Joe and Luigi Bob • Mikhail S. Gorbachev • Monster • Mr. Gibbel • Mr. President • Mrs. Gammliss • Mrs. Periwinkle • Nick • Nicole Eggert • Obi-Wan Cannoli • Pam Matteson • Patty • Patty's mother and father • Pietro • Poochie • Ralph Washington • Rob Stone • Rowdy Roddy Piper • Roxanne • Sgt. Slaughter • Shabba-Doo • Slime Ghost • Super Plant • Susanna Ross • Tawny Tyler • Ted Bull • The Old Psychic Lady with the Evil Eye Who Reads Fortunes and Knows Everything Before it Happens • Tommy Lasagna • Vincent Van Gook • Willy White • Young McDonald
Episodes	Animated	The Bird! The Bird! • King Mario of Cramalot • Butch Mario & The Luigi Kid • 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 • Stars in Their Eyes • Jungle Fever • Brooklyn Bound • Toad Warriors • The Fire of Hercufleas • Count Koopula • Pirates of Koopa • Two Plumbers and a Baby • The Adventures of Sherlock Mario • Do You Princess Toadstool Take this Koopa...? • The Pied Koopa • Koopenstein • On Her Majesty's Sewer Service • Mario and Joliet • Too Hot to Handle • Hooded Robin and His Mario Men • 20,000 Koopas Under the Sea • Mighty McMario and the Pot of Gold • Mario Meets Koop-zilla • Koopa Klaus • Mario and the Red Baron Koopa • The Unzappables • Bad Rap • The Mark of Zero • The Ten Koopmandments • The Koopas are Coming! The Koopas are Coming! • The Trojan Koopa • Quest for Pizza • The Great Gold Coin Rush • Elvin Lives • Plummers Academy • Karate Koopa • Mario of the Apes • Princess, I Shrunk the Mario Brothers • Little Red Riding Princess • The Provolone Ranger • Escape from Koopatraz • Mario of the Deep • Flatbush Koopa • Raiders of the Lost Mushroom • Crocodile Mario • Star Koopa • Robo Koopa
	Live	Neatness Counts • Day of the Orphan • All Steamed Up • Marianne and Luigeena • Slime Busters • The Mario Monster Mash • Bonkers From Yonkers • Bats in the Basement • Will the Real Elvis Please Shut Up! • Magic's Magic • Mama Mia Mario • Alligator Dundee • Dance • Cher's Poochie • Wild Thing • E.C. The Extra Creepy • The Marios Fight Back • Magician • Do You Believe In Magic? • Mommies Curse • Lost Dog • Plumbers of the Year • Mario Hillbillies • Super Plant • Fred Van Winkle • Baby Mario Love • 9001: A Mario Odyssey • Fake Bro • Time Out Luigi • Tutti Frutti, oh Mario • Flower Power • Vampire Until Ready • Heart Throb • Fortune Teller • The Magic Love • Little Marios • Gorilla My Dreams • George Washington Slept Here • Caught in a Draft • Defective Gadgetry • Toupee • The Artist • Zenned Out Mario • Texas Tea • The Great Hereafter • The Painting • Game Show Host • Home Radio • Glasnuts • Treasure of the Sierra Brooklyn • Adee Don't • Chippie Chipmunks • A Basement Divided • No Way to Treat a Queenie • Pizza Crush • Goodbye Mr. Fish • French • Two Bums From Brooklyn • Opera • Tutti Frutti Mario • Cyrano de Mario • Rowdy Roddy's Rotten Pipes • Santa Claus is Coming to Flatbush • Captain Lou Is Missing • The Ghoul of my Dreams
Live-action locations	Live-action locations	Mario Bros. Plumbing
Animated locations	Regions	Amazon Jungle • Aqua Land • Brooklyn • Brooklyn Bridge • Car Land • Caveman Land • Cloud Land • Coney Island • Cramalot • Crime Land • Desert Kingdom • Down Under Land • El Desertland • Flatbush • Grand Koopa Canyon • Happy Harbor • Jungleland • Kingdom of Youth • Koopos • Land of Ice • Land of Romance • Lava Land • Linguini Empire • Lonesome Mushroom • Mushridge • Mushroom Kingdom • Mushroom Planet • Mythis • North Pole • Oceanworld • Parsley Land • Pastaland • Pirate's Port • Pirate Waters • Pirate World • Pyramid Land • Quirk • Rap Land • River World • Robo Land • Rotundaland • Sayonara • Shamrock Kingdom • Sharewood Forest • Sharewood Village • Snow World • Sock Hop Land • Spy Land • Sudden Death Valley • Swiss Cheese Alps • Trouter Bay • Turtlevania • Victoria • Winterland • Waki-Waki • Warp Zone • Wild West
	Landmarks	Bonkers Street • Brooklyn Plumbers Academy • Chateau Koopula • Cramalot Castle • Double Cross Ranch • First Mushroom Bank • Forest of Perpetual Night and Terrible Dangers • Fort Hard Knox • Fountain of Youth • George's Gorge • King Koopa's Castle • Koopacropolis • Koopa Klub • Koopatraz State Prison • Linguini Empire Colosseum • Mushroom Colony • Outback • Pasta Pit • Quirk Factory • Rebel Fort • Rotunda Castle • Santa's workshop • Shamrock Inn • Super Spy Headquarters • Temple of Koopa • Tower of Victoria • Tunnel of Doom
Items and objects	Animated	All Purpose Portable Plumber's Helper • Aladdin's Lamp • Beanstalk • Birdo Ray • Blackbeard Koopa's Ship • Bomb Plant • Ding Bell • Excalibur • Fireball • Fire Flower • Fireproof Lava Boat • Flagpole • Flying carpet biplane • Flying Pizza • Freeze Gun • Garbage Pod • Gold Coin • Golden Plumber's Helper (King Mario of Cramalot) • Golden Plumber's Helper (Plummers Academy) • Great Balls of Fire • Heat Gun • Industrial Strength Itching Potion • Intergalactic InSinkErator • Koopa-Kola • Koop Star • Koopa Scepter • Koopa Strength Itching Powder • Koopa Surprise • Koopa's rocket • Koopilus • Lava Machine • Lightplunger • Lost Mushroom • Magic carpet • Magic doodad • Magic flute • Magic Growing Potion • Magic Shrink Potion • Magic Statue • Magical Potion • Mushroom Starfighter • Passion Potion • Peapod • Plumb-Fu • Plumber's Log • Plumbinator • Pot of Gold Coins • Power block • Red-Hot Pepper Detector • Retro Router • Robot Monster Troopa • Robo-suit • Royal Plug • Sacred Sink of Cramalot • Shrinking Sukiyaki • Sinister Star • Space Raft • Spaghetti • Spymobile • Starman • Stereo Gun • Stormtroopa Starfighter • Super Sushi • Super Sushi Shrinker • Unzappable Hat • Vegetable • Yellow spaceship
	Live-action	Mario Brothers Clog Cleaner • Mario Brothers Plant Food • Pizza Transformer • Roseitis • Secret Chippie Decoder Ring • Steam-O-Matic • Strange watch • Super Plant Growth Formula • Veggieitis