List of glitches in Generation III

This is a list of glitches in the Generation III Pokémon games.
Some glitches are found on separate pages:
* List of battle glitches in Generation III
* List of overworld glitches in Generation III
==Pokémon Ruby, Sapphire, Emerald, FireRed, and LeafGreen==
===Evolution move-learning script bug===
If the player presses both A and B buttons during the same frame on the "Delete a move to make room for {move}?" message screen after their evolves, the "Stop learning {move}?" message screen is loaded as a full black screen, making it invisible. The game behaves normally otherwise but the graphics are only properly reloaded after the player presses the A button.
In the Western localizations of , the red focus rectangle can be seen on the black screen. This does not occur in the Japanese versions or in any release of since a black focus arrow is used instead.
This behavior is not seen in non-evolution scenarios because the games use other procedures for the move-learning sequence.Emerald Teach move Glitch
===Held item loss glitch===
If , , , or is traded while holding any item, that Pokémon will evolve as expected, but its held item will be permanently lost.
This glitch also applies to Everstones. If any of these Pokémon is holding an Everstone when traded, it will still evolve, and the Everstone will be lost.
==Pokémon Ruby and Sapphire==
===256× item selling price bug===
When selling at least 256 of an item, even though the Poké Mart states the correct price, for every 256, because the number sold only takes the lower byte, the total price is actually counted as 0, and the player loses 2560 for every multiple of 256 (just like tossing them). For example, selling 999 Berries gives 2310 (0 for 768, +2310 for 231). This is normally only possible with Berries because they are the only items that the player can hold more than 99 of in one Bag slot, although through cheating the bug can be performed with other items as well.
===Berry glitch===
This bug is exclusive to earlier copies of the games as it was fixed in Japanese and European versions 1.1 and in English versions 1.2.
===Diploma bug===
While checking for National Pokédex, the game doesn't properly check for ownership of and ; while Treecko is properly checked for the Hoenn Pokédex, Chikorita is not needed for the diploma.https://github.com/pret/pokeruby/blob/0ea1e7620cc5fea1e651974442052ba9c52cdd13/src/pokedex.c#L4081
===Strain 0 Pokérus===
In only,Pokérus Logic in Ruby Disassembly X values of 0 and 8 do occur naturally, whereas in onward, the RNG does not allow them to occur at all.
Strain 0 does not behave normally, as it only sets the value for "days until cured" to 1, it has no visual indication that a Pokémon is infected, does not boost the amount of EV the infected Pokémon receives, and leaves no trace of having been infected when cured, even permitting the previously infected Pokémon to be re-infected by Strain 0, or other non-glitched strains of Pokérus (X values 1 through 15). It cannot infect Pokémon already infected with Pokérus, or cured from a non-0 strain of Pokérus.
Strain 0 also persists through trade and transfer to other games, as long as the "days until cured" value does not fall from from 1 to 0 as a result of being in the player's party when the date changes or the internal clock passes midnight.
===Yellow Scarf bug===
In Japanese Ruby and Sapphire, a Pokémon with at least 200 points in the ness condition will be able to receive both the Green Scarf and Yellow Scarf (normally for having at least 200 points in ness) even if the Pokémon's Tough condition isn't high enough. For a Pokémon with only 200 points in Smartness, speaking to the Slateport City Pokémon Fan Club Chairman once would give out the Green Scarf and speaking to him again would give out the Yellow Scarf.
==Pokémon Emerald==
====Battle Tower cloning glitch====
====Pomeg glitch====
==Pokémon FireRed and LeafGreen==
===All languages===
====Celadon City meeting location glitch====
In the summary of any Pokémon met in Celadon City, the meeting location appears as "Celadon Department Store" if the player is currently in this store or as "Celadon City" if the player is anywhere other than this store.
For instance, this glitch affects the meeting location of the from the Celadon Condominiums, the Pokémon obtained as prizes from the Rocket Game Corner, and any Pokémon caught or hatched in Celadon City.
===English language===
====Opening sequence oversight====
In English versions 1.0, the word "PRESENTS" is not shown in the Game Freak logo part of the opening sequence despite the graphics data being present in the ROM. This was fixed in English versions 1.1.
====Pokédex category oversight====
In the English version 1.0 release, if a Pokémon category has two words, the Pokédex will mistakenly only display the first word. For example, while 's category is "Poison Bee Pokémon", it is listed in-game as "Poison Pokémon". This is due to the game incorrectly treating a space in a category name as a terminator (a holdover from the Japanese versions of the Generation III games), even though the internal data has the same categories as in . This was corrected in version 1.1 of the English versions, which is the one distributed in the release.
==References==
==Related articles==
Category:Glitches by game
de:Bugs in der dritten Generation
es:Lista de glitches de la tercera generación
fr:Liste des bugs de la troisième génération
it:Elenco glitch in terza generazione
zh:遊戲漏洞（第三世代）