!!Trivia for ''Red'' and ''Blue'':
* BreakthroughHit: Game Freak made a few games before this like ''VideoGame/MendelPalace'' and ''Pulseman'', but didn't achieve success until ''Red and Blue''.
* DummiedOut:
** Apparently, [[http://bulbapedia.bulbagarden.net/wiki/List_of_Pok%C3%A9mon_by_index_number_%28Generation_I%29 the first Generation was originally supposed to have 190 Pokémon.]] Thirty-nine of them were removed and became the glitch Pokémon [[TheMissingno Missingno.]] What little is left of them is still accessible via hacking or glitching, but they are glitchy, unrecognizable and some of them even potentially {{Game Breaking Bug}}s.
** Professor Oak was supposed to have a boss fight with the starter neither you nor your rival picked; his team was the toughest in the game.
** According to [[TheWikiRule Bulbapedia]], all 39 of the cut Pokémon would later end up in ''VideoGame/PokemonGoldAndSilver''. The list contained [[{{Badass}} Scizor and Tyranitar]], who were likely cut so there would be time to properly implement [[ExtraOreDinary Steel]] and [[CombatPragmatist Dark]]-types. This also explains Ho-oh's ProductionForeshadowing in the anime, as well as the lack of {{Suspiciously Similar Substitute}}s in Generation II, as many of them were made alongside the originals.
*** Of note, we now know that Ho-oh was ''not'' among these original 39 species (although Lugia ''was''); it's generally accepted that, because Gold and Silver were being developed concurrently with the anime, it was thrown in as a DevelopmentGag.
** Cutting Pokémon for space is also why Mewtwo is in the Pokedex before Mew. There originally wasn't enough space for Mew, but after removing the debug tools, there was. Had there been enough room it is conceivable that Mew would have been placed before Mewtwo in the Pokedex.
*** Some also say that Venomoth and Butterfree were inserted into the wrong spaces, given that Butterfree bears a lot closer of a resemblance to Venonat than to Metapod.
** Also, the staff originally wanted to allow the player to pick either a boy or a girl character (the female character that had been designed would actually appear in the first-generation ''Pokémon Adventures'' manga), but there was not enough data space available to allow it. Picking your gender wouldn't be implemented until ''Pokémon Crystal'', the sister game to ''VideoGame/PokemonGoldAndSilver''.
* KillerApp: This game singlehandedly revived sales for the aging GameBoy, which ended up getting [[GameBoyColor an upgraded version]] the same year as the North American versions of the games.
* LetsPlay:
** A mostly text-based one can be found [[http://dragon-quill.blogspot.com/search/label/Pokemon%20Blue here.]]
** ''LetsPlay/TwitchPlaysPokemon'', a crowdsourced Let's Play that takes inputs from an IRC channel. Despite the chaotic nature of it, somehow, within 16 days of continuous playing, they managed to beat the Elite Four and Blue, and managed to catch Zapdos, a legendary Pokémon, to boot!
** There's also [[http://lparchive.org/Pokemon-Blue/ "Let's horribly break Pokemon Blue"]] by Metroixer.
* SleeperHit: Nintendo of Japan actually said ItWillNeverCatchOn while releasing Japanese ''Red and Green'' and writing it off as a loss. It didn't top the sales charts, but it kept ''selling steady'' in a market where 80% of sales are made in the first two weeks. Game Freak made a few tweaks, released [[UpdatedRerelease Japanese Blue]] and Nintendo got their cash cow.
* UrbanLegendOfZelda: There's a rumor that's been floating around since these games came out about a hacked version known as Pokémon Black (not to be confused with ''VideoGame/PokemonBlackAndWhite''), found on a black-painted cartridge. The player is given a Pokémon known as 'Ghost' instead of one of the starters, and it cannot be put into the PC. It attacks opponents with Curse, and if you return to an area after beating a trainer, it's indicated they died as there's a tombstone present. After beating the game, the player character's Pokémon are all gone and the sprite is swapped for an old man sprite. Going back to Pallet Town results in the character being attacked by the spirits of the Pokemon they killed on their way to beating the game, with the character using Struggle until they die. Its existence is questioned, but a ROM like this does exist online. [[http://www.gameinformer.com/blogs/members/b/omegaspartan08_blog/archive/2010/07/30/pok-233-mon-black-a-hacked-game-of-death.aspx Article here]]
** A rumor has always been around that when the games were first released in Japan, loads of little children [[BrownNote got ill and committed suicide]] because of the [[http://www.youtube.com/watch?v=JNJJ-QkZ8cM Lavender Town music.]] Some people thought this was why the music was subtly changed to remove some of the high pitched notes in the American remakes. In reality, the music was changed because people in Japan had been getting headaches from the shrillness of it.
** TheMissingNo ([[TropeNamer or Missing Number]]) has had a number of rumors around it, some said catching it would damage your cartridge others say that it would erase your data.
** There's a truck sprite that only appears once in the game. The only way to see it is to go way out of your way to avoid triggering a certain plot event that closes off the area and returning when you can travel on water. People believed that it had to have been put there for a reason, leading to hundreds of rumors about this thing. As it turns out, it's just a truck.
** Then there's all the rumors about how to catch [[SecretCharacter Mew....]]
*** Not to mention to rumored existence of additional secret Pokémon, from the infamous "Pikablu" to the PokéGods, and the incredibly difficult and convoluted ways to get them to appear in the game.
** Speaking of Vermilion City, the S.S. Anne was said to return there after the player beat the Elite Four so many times.
** Averted in that exploitation of how the game engine processes data will allow you to encounter any monster of your choosing...[[http://bulbapedia.bulbagarden.net/wiki/Mew_glitch including Mew]].
* WhatCouldHaveBeen: There were many changes, but most notably, there once was a [[http://archives.bulbagarden.net/media/upload/7/70/Kensugiart3.png female protagonist]]. She was excluded presumably due to a lack of space for her data and reused for ''[=FireRed=]''/''[=LeafGreen=]'' as "[[http://bulbapedia.bulbagarden.net/wiki/Leaf_%28game%29 Leaf]]".
** Her design was used for Blue (known as Green in the US) in the Pokémon manga Manga/PokemonSpecial.
** Professor Oak was originally meant to be the TrueFinalBoss! Though it never happens naturally in the game, you can use a convoluted set of steps to trigger a glitch allowing the DummiedOut fight to occur.[[http://www.youtube.com/watch?v=NgeOPyntJ-k]]
** It was originally intended to have 190 Pokémon, though it seems the dropped ones were introduced in Generation II.

!!Trivia for ''Yellow'':
* RecursiveAdaptation: It's a game based on TheAnimeOfTheGame, and in addition to some {{Canon Immigrant}}s, there are some touch-ups on sprites and Pokémon used in Gym battles: Brock and Misty wear their respective outfits from the anime (in the original games, Brock was [[WalkingShirtlessScene shirtless]] and Misty wore a bikini), and Lt. Surge only uses Raichu in battle, which is what he also did in the anime.[[note]]He used 3 Pokemon in ''Red and Blue'', and the remakes and later games follow this instead[[/note]].
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