* 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.
* DeaderThanDisco: In most of the world, this is the franchise's current status.
* DracoInLeatherPants: It's not uncommon for characters brought on from neglect or abuse to be as popular as the perfectly healthy ones.
* EarWorm: The movie and anime theme songs.
* GermansLoveDavidHasselhoff: Apparently, there is a cult following of Tamagotchi in Poland.
* 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 sound of a Tamagotchi evolving. And as of the newer version, the "victory" sound when perfectly completing a game.
* NightmareFuel: [[spoiler:Blackholetchi.]]
** NightmareRetardant: [[spoiler:When he does finally wake up, he resembles a giant space squid, and has an equally goofy voice.]]
* PlayerPunch: The death sequence on any Tamagotchi is drawn out to be as heartbreaking as possible. This is turned UpToEleven on the Gameboy edition, where you're forced to watch your Tamagotchi's last moments while sad, solemn music plays.
* ScrappyMechanic: The overall toy; many people have had less trouble taking care of a real animal than a Tamagotchi or anything similar.
** 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]].
* ThatOneLevel: Level 59 of ''Tap and Hatch''. It ''can'' be completed without paying for power-ups, but it's an agonizing endeavour.
* TheyJustDidntCare: Bandai US's attempted revival, ''Tamatown Tama-Go'', is this. With how little marketing Bandai did for the line, as well as how little product has been released, one must wonder if Bandai US even ''wanted'' to keep the franchise going.
* 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.