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Closed menu Select glitch: Difference between revisions

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When the Select button is held down on a bag or PC item, the game writes to memory address CC35 which is a value for the list entry number highlighted. Due to an oversight, the game does not clear the value after the menu is closed with B, allowing the player to swap entries beyond the end of the list. For example, pressing Select on Bag item 10 from the overworld, exiting with B, B and entering a battle will allow the player to swap Pokémon 10 with a Pokémon of their choice and cause memory corruption, even if less than 10 Pokémon were in the party.
 
This glitch functions differently between the [[List of revision differences in the core Pokémon games|original revisions]] of the Japanese ROM (collectively one revision due to no game code/data changes), and the later revisions (also collectively one revision due to no game code/data changes). In the original revisions, any changes to CC35 (select button held down) are kept after closing the in-battle menu, allowing for the [[partial switch glitch]] to occur within a Pokémon battle. In the later revisions, changes to CC35 are lost after closing the in-battle menu (making the partial switch glitch impossible), however, the glitch can still be exploited if it is set up from the inventory menu and carried forward into the party menu from a Pokémon battle, the Day Care man, or the Name Rater.
 
The equivalent Select glitches can be simulated with the [[expanded party]] or a [[no expanded party international Select glitching]] method (minus ones involving moves beyond slot 4).
==Method==
 
==Method 1*==
#Open the Start menu(*)
#Enter battle
#Open the Bag(*)
#Highlight an item with 'Select'
#Close menu with B
#Access the party menu
#Press A on a Pokémon, or moves list (press Select on a move)
 
<nowiki>(*):</nowiki> Revision differences (detailed above) apply. Impossible on v1.1 releases.
 
==Method 2/3/4==
#Open the Start menu(*)
#Open the Bag
#Highlight an item with 'Select'
#Close both menus with B, B.
#Enter battle, andtalk to the Day Care man, or talk to the Name Rater to access the 'PkMn'party menu.(**)
#Press A on a Pokémon
 
==Select glitch workaround==
<nowiki>(*):</nowiki>Steps 1 and 2 can be replaced with accessing the player's stored items in the Pokémon storage system. Additionally, in [[List of revision differences in the core Pokémon games|version 1.0]] of Red and Green (but not Rev A or Japanese Blue) it is not necessary to open the Start menu and a Select glitch may be performed by pressing Select from the bag item menu within battle. This enables the [[partial switch glitch]].
Due to [[Zero maximum HP glitch|zero maximum HP glitch]] or possibly another complication; a Select glitch may sometimes lock up the game after the swap. A solution is to simply have an [[GlitchDexJP/RG:255|アネ゙デパミ゙ (FF)]] in the party above the position the player is trying to swap; as this hides details like the HP bar.
 
==Trivia==
<nowiki>(**):</nowiki>Step 5 can be replaced with choosing to deposit a Pokémon with the [[bp:Pokémon Day Care|Pokémon Day Care]] on [[bp:Kanto Route 5|Route 5]], or rating the name of a Pokémon at the Name Rater's house in Lavender Town.
According to Pokémon Lab (a no longer existing Japanese glitch, datamining and hacking website from 1997), method 2 was actually a discovery by a user called noborukun, which raises a question if very early in glitching history this glitch was thought to be exclusive to the v1.0 version (assuming the community was aware of revision differences); as method 1 is impossible on v1.1 releases.<ref>[https://web.archive.org/web/20181203041808/http://www.geocities.jp/pcakatsuki/pokemonlab/bug1.html Pokémon Lab page detailing glitches]</ref>
 
==References==
After opening the Pokémon menu, the select button remains highlighted in the same position as it was when highlighting an item. This allows for the player to swap one Pokémon in the middle of battle. If the cursor is placed out of bounds of the Pokémon menu, then this allows for the player to swap portions of the game's internal memory, resulting in a number of 'select button glitches'.
<references/>
[[Category:Generation I glitches]]
[[Category:Generation I natural glitches]]
[[Category:Natural glitches]]
[[Category:Terminology]]
[[Category:Select glitches|*]]
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