* ArchivePanic: The 2009 anime consists of 271 episodes spread over four installments. There's also a web series (''Let's Go! Tamagotchi'') that's 12 episodes long, two [[TheMovie movies]], another anime (though thankfully every episode of which is only several minutes long) and several [=OVAs=] from the nineties, a short film, and the ''Tamagotchi Friends'' web series, which is just the first few episodes of ''Tamagotchi! Yume Kira Dream'' edited into 14 three-minute-long shorts and dubbed in English. Counting this part of the series, the entire archive binge would consist of over 300 items.
* CrackIsCheaper: If you're looking to complete your Tamagotchi collection, be prepared to shell out ''a lot'', especially if you're interested in a Yasashii, Devilgotchi, or Santagotchi.
* CreatorsPet: Lovelitchi/Lovelin can come off as this in the Tamagotchi! anime. She's an extremely popular and talented idol who gets talked up by everyone and is adored by her staff and classmates alike. While the rest of main cast could be considered to have certain flaws, [[BaseBreaker Lovelitchi]] seems almost angelic by comparison, honestly. Many episodes in the first season also focused more on her than other characters who had existed longer and had a larger role in the franchise. In terms of the virtual pets, ever since her introduction she's been a raisable character on ''every'' release since, managing to outshine even SeriesMascot Mametchi.
* DracoInLeatherPants: It's not uncommon for characters brought on from neglect or abuse to be as popular as the perfectly healthy ones, despite many of them being listed in their bios as being nowhere as pleasant as the healthier ones.
* EarWorm: The movie and anime theme songs.
* EnsembleDarkhorse: This was inevitable given the [[LoadsAndLoadsOfCharacters amount of characters]], but several of the secondary characters seem to have their fair share of fans. In particular, Mimitchi's character profile pamphlet that was released with the character's Gotchi Gear carrying pouch states that he, not Mametchi, is the most popular ''Tamagotchi'' character.
* GermansLoveDavidHasselhoff: Apparently, there is a cult following of Tamagotchi in Poland.
* [[SugarWiki/HeartwarmingMoments Heartwarming Moments]]:
** Seeing two Tamagotchis marry.
** In the movie, Chamametchi's birth.
*** At the end of the movie, [[spoiler:Mametchi and Chamametchi leave Tanpopo a message on her Tamagotchi toy, thanking her for her help.]]
** In ''Tamagotchi! Yume Kira Dream'' episode 22, [[spoiler:Ikaritchi and Aguritchi reunite, and Ikaritchi finally shows Mametchi respect and appreciation.]]
** In ''Tamagotchi! Yume Kira Dream'' episode 26, Mametchi [[spoiler:finally learns how to sing, and sings a little song for Himespetchi.]]
* MemeticMutation: The Music for Left or Right, due to Protonjon featuring it during his Fortune Cookie Strams
* MorePopularSpinoff: ''Franchise/{{Digimon}}'', the franchise's SpearCounterpart, is still active today and doing better than it has for a while in Japan. ''Tamagotchi''... not so much.
* MostAnnoyingSound: The Tamagotchi's original "attention" beep is infamous for this.
* MostWonderfulSound: The various sounds used to indicate a Tamagotchi evolving. And as of the modern versions, the "victory" sound when perfectly completing a game.
* NightmareFuel:
** The Game Boy games ramp up the original releases' death sequences by adding flashing screens and a montage of the Tamagotchi in a number of poses (many of which indicate they are in agony), topped off with a rather depressing song as its spirit floats about. It isn't exactly the best material for its target audience. While the second game removed the flashing screen, the third one replaced the original death theme with a ''much'' creepier new one.
** [[spoiler:Blackholetchi]], the final source of conflict from the first movie.
*** NightmareRetardant: [[spoiler:When he does finally wake up, he resembles a giant space squid, and has an equally goofy voice.]]
** That...awful robot husband Mametchi builds in ''Tamagotchi! Yume Kira Dream'' episode 25. Especially its crude face. Mametchi's friends are rightfully unnerved.
* PeripheryDemographic: The franchise is aimed at girls, but there are quite a few boys who like it as well.
* PlayerPunch: The death sequence on any Tamagotchi is drawn out to be as heartbreaking as possible. particularly on the originals where the Tamagotchi lays down ill while a heart monitor plays and gradually slows until the flatline. This is turned UpToEleven on the Gameboy edition, where you're forced to watch your Tamagotchi's last moments while sad, solemn music plays.
* PortingDisaster: The Tamagotchi L.I.F.E. apps are ports of the original virtual pets. While there are minor issues like the animations being off, the biggest issue is how the pets' growth patterns and conditions are altered or don't exist, meaning it's nearly impossible to get certain characters.
** The Generation 2 update completely changes the mechanics of the Gen 2 game, adding the number 0 (originally it only allowed 1 through 9), letting the pet's second number sometimes be the same as the first, and the "next" number after a round is random instead of the last number they thought of.
** The Angel app has the programming and sprites in place for using the Praise icon, but the pet ''never'' calls for it. Worse, there's much more leeway on raising it, so a player could obtain the best character with absolutely no effort, while getting anything less requires carefully balancing neglect and care, and some luck.
* PortmanteauCoupleName: Mamespetchi for Mametchi/Himespetchi.
* ScrappyMechanic:
** The overall toy; many people have had less trouble taking care of a real animal than a Tamagotchi or anything similar. It's particularly bad with the vintage releases - as the Tamagotchi grows older, the rate at which its hearts begin to deplete grows until the point where they're needier than the babies.
*** The Ocean takes the crown for being one of ''the'' hardest Tamagotchi releases to raise - it may be popular for its rarity, but it definitely isn't beloved for its gameplay. Every character on the device is unusually fragile (Even Ningyotchi loses hearts quicker than a teenager and will be lucky to outlive something like a Nyorotchi, two major differences compared to '''every''' other special adult on the vintage pets), the predator system means that a close eye needs to be kept more than usual so the Tamagotchi doesn't die, and the RNG-based game has a chance to empty all of the happy hearts and water quality. Most young Tamagotchi on vintage releases naturally get sick once a stage about 12-24 hours before evolution - Kuragetchi and the teens naturally get sick ''multiple times every day''. Failure to raise the discipline bar beyond 5/7 before evolution time results in death, [[GuideDangIt and nothing in the manual warns you of this]].
** Early on, the built-in clock. When the original toy launched in 1997, there was plenty of confusion as to what the clock was for. It was on the toy for two reasons: to give the Tamagotchi a practical value of being a watch, and to make sure the Tamagotchi woke and slept at regular hours. What happened instead was users put the clock to any time, causing the Tamagotchi to sleep during the day and wake up at night.
** The Push Notifications for the iPhone edition quickly become this once the baby's born.
* TastesLikeDiabetes: The series can be this.
* TearJerker: When your Tamagotchi dies.
** Everywhere in TheMovie. First we have Mametchi [[spoiler:breaking down to tears when he hears that the sun left Tamagotchi Planet because of him]]. Not much longer later, [[spoiler:he falls into a black hole trying to save the planet, and [[NightmareFuel he's TERRIFIED of the dark]], followed by shots of the entire cast (including his little sister and family) watching on in horror]]. And we all knew that Tanpopo would go home at the end of the film, but we didn't expect [[spoiler:Chamametchi bursting into tears, and the rest of the cast slowly following suit]].
** ''Tamagotchi! Yume Kira Dream'' episode 20 is full of this. [[spoiler:Mametchi's still miserable after losing the competition in the last episode, and an argument with Ikaritchi prompts him to run away and find a new place to stay.]]
*** Even worse, he later visits Himespetchi and asks her to [[spoiler:bring him back to Tamagotchi Town. After a fierce argument, Himespetchi throws Mametchi out of her ship before curling up on the floor and crying.]]
* ThatOneLevel: Level 59 of ''Tap and Hatch''. It ''can'' be completed without paying for power-ups, but it's an agonizing endeavour.
* ThatOneSidequest:
** Obtaining Lucky Unchi-kun on the Angel, let alone a ''raisable'' one, is purely a LuckBasedMission. Sabotenshi/Kitsutenshi have a chance of their usual farewell screen being replaced by a faceless Lucky Unchi-kun, and starting a new run but not touching ''any of the buttons at all'' until it departs nearly a week later may also produce such a farewell screen. Whether or not you can obtain the raisable iteration is decided when an Obaketchi 2 is born with a minuscule chance, the only way to find out until it is due to evolve into Maruten an hour later is if its Angel Power manages to surpass 30, loses hearts much slower than usual, takes a stroll, prays, doesn't take a nap or falls asleep when nightfall comes. Should this Obaketchi 2 be kept alive for about a week, it will evolve into Lucky Unchi-kun.
** Ashigyotchi, the unhealthiest adult on the Ocean, is thoroughly believed to be harder to obtain than ''Ningyotchi'' due to how susceptible the characters are to neglect. It is believed to be possible to raise a character on the device to adulthood without ever feeding or playing games with it, but attaining sufficient discipline points is vital to keeping it alive. However, getting the discipline required for evolution will likely cause Kuragetchi to evolve into Otototchi, whose unhealthiest possible adult is Kujiratchi.
* TheProblemWithLicensedGames: The original Game Boy game is notorious for how easy killing a Tamagotchi is (even moreso than the [[NintendoHard Ocean]]) and the frustrating mechanics of the games. Even if you don't neglect it, it might suddenly just decide to die out of nowhere. The entire Game Boy trilogy's death scenes are also infamous for their disturbing ways of playing out, even to some adults.
* TheyChangedItNowItSucks: Fans flocked over to Website/YouTube and screamed at Bandai for replacing the franchise's anime with ''Anime/KamisamaMinaraiHimitsuNoCocotama'' on Japanese TV.
** Subverted for this case; fans were actually ''sad'' over the fifth anime being ''no new episodes'', but with older episodes and a segment with live actors and a cheaply animated ''UsefulNotes/AdobeFlash'' Mametchi.
* TheyWastedAPerfectlyGoodPlot: The iD L 15th Anniversary Version in Japan. It was meant to be a celebration of Tamagotchi toys for the past fifteen years...except Bandai put the character roster up as a poll on the site, where people could vote on which adult characters they wanted. As much of the original audience in Japan was gone and replaced with those who know Tamagotchi primarily from the anime adaption, the end result was only ''five'' vintage adult characters making the cut (out of 32 total adult characters), while the rest of the cast comprised of characters made popular by the anime.
* UglyCute: Many of the characters obtained from neglect have a sort of charm all their own.