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Item underflow glitch (event method): Difference between revisions

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[[File:Item underflow old.png|thumb|right|160px|The [[expanded items pack]], accessed straight after performing the glitch]]
 
The '''item underflow glitch (event method)''' was discovered by MrWint. It allows the player to obtain an inventory of 255 items (see [[expanded items pack]]). This method will only work with the main inventory and not the stored PC inventory (unlike the later documented [[dry underflow glitch]]).
 
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== Methods to obtain x255 stack ==
 
'''Method===Using 1 (MissingNo.):'''===
{{MissingNo. underflow}}
 
1) Encounter a [[MissingNo.]] (e.g. with [[old man glitch]], [[Trainer escape glitch]]) to add 128 to the sixth item quantity (if less than 127).
 
'''For Pokémon Yellow:'''
 
Unstable MissingNo. will not freeze the game if encountered for the first time after a wiped save file with Up+Select+B and if no other glitch Pokémon sprite was viewed. More reliably, the double Trainer escape glitch with Level 80 Starmie can be used ([https://www.youtube.com/watch?v=73fAlzIbi9k&t video]) to encounter a Fossil/Ghost MissingNo., which will not freeze the game. Alternatively though more difficult, the player may perform the Ditto glitch sub-glitch of the Trainer escape glitch by having Ditto Transform into a Pokémon with 182, 183, 184 Special.
 
2) Either encounter MissingNo. again or catch it with the sixth item quantity as x127 to get the x255 stack. Note this will not work when catching the MissingNo. if the item used to catch it was the sixth and a Poké Ball x127, therefore items like X Special are more desirable (also in this case, because X Special can be used for [[Celadon looping map glitch]])
 
 
===Other methods===
== Steps to reproduce dry underflow glitch ==
*[[Dry underflow glitch]]
# Order your items so that your 2 tossable items are in slots 1 and 2 and the item x255 is in slot 3.
*See [[expanded items pack]]
# Toss everything below the item x255.
# Toss the top two items so you have three items x255 (item count=1)
# Toss 253 of the first item x255.
# Swap item 1 with item 2.
# Swap item 1 with item 2, again.
 
You can also do this with items below the third (and initial) 255 stack. You need to count how many items you have, then after step 3 toss the top item x255 the number of items you initially had -2.
[[Category:Generation I glitches]]
[[Category:Major glitches]]
[[Category:Speedrunner glitches]]
[[Category:Speedrunner glitches (Red/Blue/Yellow)]]
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