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Evolve without an evolutionary stone (view source)

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{{Misc R/B}}
{{incomplete}}
[[File:C9 Card Key evolution.png|frame|right|This glitch is the only way to access some of the Red/Blue glitch Pokémon's evolutions, such as [[GlitchDex/RB:201|◣ゥ 8]] (hex:C9)'s evolution via 'exposure to a Card Key' at at least level 28, into [[GlitchDex/RB:229|C]] (hex:E5).]]
The '''evolve without an evolutionary stone glitch''' is a glitch in Pokémon Red and Blue that allows the player to evolve a Pokémon without an evolutionary stone, or to access glitch Pokémon evolutions that would otherwise be impossible. It was fixed in Pokémon Yellow.
 
== Requirements ==
 
#A Pokémon that evolves by evolutionan evolutionary stone, such as Clefairy, Staryu, or Pikachu, as the first Pokemon in your party.
#One of the following Pokemon, each one of which corresponds to an evolution stone, in your party.
*Exeggutor - Moon Stone
*HEX 20 [[Missingno.]] - Fire Stone
*Psyduck - Leaf Stone
*Growlithe - Thunderstone
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== Directions ==
 
#The player has to get into a trainerTrainer battle.
#Have the first Pokémon in the player's party, the one he or she is trying to evolve, gain a level.
#Switch out the Pokémon that the player is trying to evolve and put the Pokémon that corresponds to the necessary evolution stone.
#Have that Pokémon finish the trainer battle.
 
== Additional Informationinformation ==
 
This glitch can also be done when encountering a wild Pokémon. Have the Pokémon youryou're trying to evolve start the battle and then change Pokémon and place the Pokémon that corresponds to the required evolution stone in battle. Have the Pokémon end the battle. Both Pokémon will gain experience and for the glitch to work, the Pokémon the player is trying to evolve will need to gain a level from the experience it gains.
 
== Evolving glitch Pokémon with this glitch ==
One should be precautious not to let this glitch happen to the starter Pikachu on Pokémon Yellow because it will force it to evolve regardless of the fact that this is normally impossible as it refuses to take the Thunderstone. However, the player could always purposely evolve the Pikachu to make either gameplay easier or fill in Raichu's Pokédex entry but a Raichu with the player's OT will ''not'' follow the trainer.
Certain glitch Pokémon evolve by 'exposure to an item' that isn't an evolutionary stone. Others may evolve with a valid stone, but only through this glitch and not through the actual item. An example is the glitch Pokémon [[GlitchDex/RB:207|O PkMn4 X]], which can evolve at level 6 or more when using this glitch with Exeggutor (corresponding to Moon Stone).
 
Here is a list of glitch Pokémon stone or item evolutions by Echinodermata. Note that the data was taken from the ROM, so there may be some evolutions that do not work.
== Why It Works ==
 
{| border="1"
The reason this glitch occurs is because the two operations, detecting a used a item and detecting which Pokemon is in battle, happen to share the same variable. The variable is 01XX91CF for Red and Blue, and 01XX90CF for Yellow. Use a Potion, and this variable is filled briefly by "14". Enter a battle, and send out a Pidgey, and the variable will become 24.
!Glitch Pokémon
!Stone/item evolution 1
!Stone/item evolution 2
!Stone/item evolution 3
!Stone/item evolution 4
|-
|[[GlitchDex/RB:196|Hex:C4]].
|Level 128 by item Great Ball (Nidoran♂) into Hypno.
|N/A.
|N/A.
|N/A.
|-
|[[GlitchDex/RB:201|Hex:C9]].
|Level 28 by item Card Key (Drowzee) into [[GlitchDex/RB:229|glitch Pokemon hex:E5]].
|N/A.
|N/A.
|N/A.
|-
|[[GlitchDex/RB:207|Hex:CF]].
|Level 6 by item Moon Stone (Exeggutor) into Gengar.
|N/A.
|N/A.
|N/A.
|-
|[[GlitchDex/RB:208|Hex:D0]].
|Level 46 by item TM34 ([[GlitchDex/RB:234|glitch Pokémon hex:EA]]) into [[GlitchDex/RB:209|glitch Pokemon hex:D1]].
|N/A.
|N/A.
|N/A.
|-
|[[GlitchDex/RB:212|Hex:D4]].
|Level 179 by item TM40 ([[GlitchDex/RB:240|glitch Pokémon hex:F0]]) into [[GlitchDex/RB:203|glitch Pokemon hex:CB]].
|N/A.
|N/A.
|N/A.
|-
|[[GlitchDex/RB:219|Hex:DB]].
|Level 17 by item glitch item "[[ItemDex/RB:193|4S v é]]" ([[GlitchDex/RB:193|glitch Pokémon hex:C1]]) into Nidoqueen.
|N/A.
|N/A.
|N/A.
|-
|[[GlitchDex/RB:220|Hex:DC]].
|Level 175 by item TM05 ([[GlitchDex/RB:205|glitch Pokémon hex:CD]]) into Missingno. hex:20.
|N/A.
|N/A.
|N/A.
|-
|[[GlitchDex/RB:227|Hex:E3]].
|Level 19 by item Great Ball (Nidoran♂) into Electabuzz.
|N/A.
|N/A.
|N/A.
|-
|[[GlitchDex/RB:232|Hex:E8]].
|Level 52 by item HP Up (Fearow) into Growlithe.
|Level 11 by item [[ItemDex/RB:126|glitch item hex:7E] (Machamp) into Kangaskhan.
|Level 216 by item TM50 ([[GlitchDex/RB:250|glitch Pokémon hex:FA]]) into [[GlitchDex/RB:208|glitch Pokemon hex:D0]].
|N/A.
|-
|[[GlitchDex/RB:233|Hex:E9]].
|Level 36 by item TM34 ([[GlitchDex/RB:234|glitch Pokémon hex:EA]]) into [[GlitchDex/RB:204|glitch Pokemon hex:CC]].
|Level 175 by item TM05 ([[GlitchDex/RB:205|glitch Pokemon hex:CD]]) into Missingno. (hex:20).
|N/A.
|N/A.
|-
|[[GlitchDex/RB:234|Hex:EA]].
|Level 138 by item Oak's Parcel (Doduo) into [[GlitchDex/RB:206|glitch Pokémon hex:CE]].
|Level 138 by item Oak's Parcel (Doduo) into [[GlitchDex/RB:206|glitch Pokémon hex:CE]]. (appears in the data again){{fact}}
|Level 225 by item Rare Candy (Chansey) into Farfetch'd.
|Level 8 by item Water Stone (Onix) into [[GlitchDex/RB:000|'M (00)]].
|-
|[[GlitchDex/RB:238|Hex:EE]].
|Level 6 by item Moon Stone (Exeggutor) into Gengar.
|N/A.
|N/A.
|N/A.
|-
|[[GlitchDex/RB:243|Hex:F3]].
|Level 164 by item TM24 ([[GlitchDex/RB:224|glitch Pokemon hex:E0]]) into Missingno. (hex: 3E).
|Level 46 by item TM34 ([[GlitchDex/RB:234|glitch Pokemon hex:EA]]) into [[GlitchDex/RB:209|glitch Pokemon hex:D1]].
|N/A.
|N/A.
|-
|GlitchDex/RB:247|Hex:F7]].
|Level 195 by item Master Ball (Rhydon) into Missingno. (hex:5F).
|Level 195 by glitch item [[ItemDex/RB:129|4 4 y PC...... 4 ぅ 4 H]] hex:81 (Hypno) into Missingno. (hex:5F).
|N/A.
|N/A.
|-
|[[GlitchDex/RB:251|Hex:FB]]
|Level 14 by item Fire Stone (Missingno. hex:20) into Missingno. (hex:AF).
|Level 17 by item Fire Stone (Missingno. hex:20) into Missingno. (hex:AF).
|Level 124 by item Pokédex (Ivysaur) into [[GlitchDex/RB:230|glitch Pokemon hex:E6]].
|Level 208 by item TM24 ([[GlitchDex/RB:224|glitch Pokemon hex:E0]]) into [[GlitchDex/RB:201|glitch Pokemon hex:C9]].
|-
|[[GlitchDex/RB:254|Hex:FE]]
|Level 8 by item Super Repel (Missingno. hex:38) into Chansey.
|Level 51 by item TM03 ([[GlitchDex/RB:203|glitch Pokemon hex:CB]]) into [[GlitchDex/RB:250|glitch Pokemon hex:FA]].
|N/A
|N/A
|}
 
== Explanation ==
 
The reason this glitch occurs is because the game uses the same memory address to detect whether an item is used or whether a Pokémon is in battle.
 
The memory address is CF91. Use a Fire Stone outside of battle, and this variable is filled briefly by hex:20. Enter a battle, and send out a hex:20 Missingno., and the variable will become hex:20.
 
== Video Demonstration ==
Anonymous user
Retrieved from "https://glitchcity.wiki/wiki/Special:MobileDiff/16959"
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