After Ned Flanders reveals that he's sixty years old and looks young because of his cautiousness and clean living, everyone begins pitying Ned for being a boring old man. To combat this, Ned joins Homer on a trip to Vegas, where the two gamble away their money, drink themselves stupid, and end up married to two skanky barmaids who call upon Vegas' most popular entertainers to capture them when Homer and Ned plot to divorce them.
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!!!This episode contains examples of (YMMV tropes found [[YMMV/TheSimpsonsS10E10VivaNedFlanders here]]):
* AccidentalMarriage: Homer and Ned's drunken marriages to Amber and Ginger.
* BackForTheDead: The Monty Burns Casino
* CallBack: The Monty Burns Casino, introduced back in Season 5's [[Recap/TheSimpsonsS5E10Springfield "$pringfield"]], is demolished in this episode (and Lisa brings up the events of [[Recap/TheSimpsonsS9E22TrashOfTheTitans "Trash of the Titans"]] when she asks why the casino -- which hasn't seen any action since "$pringfield" -- would be brought back if nobody wants it anymore). Its absence prompts Homer to take Flanders to Vegas for fun.
* CurbStompBattle: Homer and Ned get their asses kicked by almost everyone in Vegas, including Drederick Tatum, Music/TheMoodyBlues, and a white tiger.
* EditedForSyndication: Homer's reference to Barney Gumble sharing a birthday with Adolf Hitler (April 20th) is changed on a lot of reruns (both domestic and international) to Barney sharing a birthday with Lassie the dog (July 15th). The version that aired on FXX during the "Every Simpsons Ever" episode had the July 15th line instead of the April 20th line. The original line can be found on the season 10 DVD set.
* GoodIsBoring: Springfielders are amazed at Ned's longevity and youthfulness until he reveals how much he's deprived himself in order to attain it.
-->'''Ned:''' I resist all the major urges.
-->'''Sideshow Mel:''' All of them?
-->'''Marge:''' You mean you've never splurged and say, eaten an entire birthday cake and blamed it on the dog?
-->'''Edna Krabappel:''' You've never licked maple syrup off your lover's stomach?
-->(''Agnes Skinner glares at Seymour'')
-->'''Bart:''' (''halfway outside, holding a crowbar'') You've never snuck out of church to break into cars?
-->'''Ned:''' No, no, and double no! I haven't done any of those things, folks. You name it, I haven't done it!
-->'''Homer:''' Jeez, Flanders, you're sixty, and you've never lived a day in you life!
-->'''Carl:''' Yeah, even the boy in the bubble had a deck of cards.
* ITakeOffenseToThatLastOne:
--> '''Ned''': This is all your fault. You and your stupid program!
--> '''Homer''': Blame me if you must, but don't ever speak ill of the program!
* ItBurns: Moe says it after splashing himself with holy water, thinking it's what makes Ned look young.
* LampshadeHanging: The Monty Burns Casino is finally seen in an episode after the one from when it was built and it was commented in-universe how, one week after its opening, nobody would remember it until now.
* MuggedForDisguise: Hilariously subverted. While being chased, Homer and Ned grab a pair of janitors and fight them offscreen in a closet. The janitors walk away unscathed, whereas Homer and Ned collapse badly bruised.
* NoEnding: Homer and Ned are thrown out of Vegas and are forced to walk home. When the credits roll, they're being attacked by vultures.
* OlderThanTheyLook: In this episode, it's revealed that Flanders is sixty. He apparently accomplished his younger appearance through "clean living, chewing thoroughly, and a daily dose of Vitamin Church".
* RealMenCook: Apparently men who live in the impulse zone spit-roast meats over their chimneys using tires as fuel for the fire.
* RhymesOnADime: Music/TheMoodyBlues begin a rhyming piece concerning Homer and Ned's predicament and seeming cruelty of fleeing their Vegas wives until they decide to "can the poems" when it's "ass-whooping time".
* RiddleForTheAges: Homer has an explanation for why Mr. Burns' casino has been taken with the rest of town but, when he was about to tell it, he was interrupted by the noise of the casino being demolished and the issue has never been brought up again.
* RuleOfThree: This conversation
--> '''Ned''': This may sound just a teensy bit insane in the ol' membrane, Homer, but I was wondering if you could show me how to have some fun.
--> '''Homer''': [with arms crossed] Well, well, well, so Flawless Flanders needs help from Stinky-Pants Simpson.
--> '''Ned''': Heh, heh, yeah, I guess I do.
--> '''Homer''': Welly, welly, welly. Mister Clean wants to hang out with Dirty Dingus [=McGee=].
--> '''Ned''': How 'bout it, Homer, will you teach me the secret of your intoxicating lust for life?
--> '''Homer''': Wellisy, wellisy, wellisy...
--> '''Ned''': Stop that!
* SeriesContinuityError: Ned is said to be 60 years old, however previous episodes, most notably "Hurricane Neddy", had shown he was a child in TheFifties with {{Beatnik}} parents, which would make him a baby boomer (born between 1946-64) and put him in his early 50s at most.
** Though since the show is still on the air in the 2010s, Ned would indeed be in his 60s by this point.
* SoLongSuckers: Homer and Ned try to escape in a Vegas contest car with Homer even shouting this. [[SubvertedTrope They promptly get beaten up by the masses.]]
* TheCameo: Ralph Steadman's caricatures of HunterSThompson and Oscar Acosta from ''FearAndLoathingInLasVegas'' drive past Homer and Ned, coming from Vegas with the Raoul Duke caricature complaining there are too many kids there.
* VivaLasVegas: The setting, naturally.
* WhatCouldHaveBeen: The producers wanted to use a Music/BruceSpringsteen cover of "Viva Las Vegas" instead of the original Music/ElvisPresley rendition that's often used in television and film depictions of Las Vegas, but were unable to clear the rights for the Bruce Springsteen cover in time.