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Dry underflow glitch: Difference between revisions
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'''Dry underflow glitch''' is a [[glitch]] in {{RBY}} and a major sub-glitch of having a x255 item stack. Similar to the [[item underflow glitch (event method)]], it allows the player to get an [[expanded item pack]] by decreasing the item count while it is already 0, making it underflow to 255. It relies on an implementation quirk in an in-game mechanic which allows the player to merge two item stacks (e.g. Ultra Ball x1, Ultra Ball x20) of the same kind into one stack, by swapping them.
It was documented by luckytyphlosion ([
Since this method doesn't require the Saffron guards to be thirsty or a Fossil, it can be done either very early in the game (e.g. in the "Catch 'em All" speedrun), or very late (e.g. on a completed game). Also, it can be done with the PC items, allowing one to edit more RAM addresses that could otherwise only be manipulated with [[arbitrary code execution]] or [[Map_254_(Yellow)|map FE]].
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