View source for Unstable hybrid Pokémon

{{samename|glitch Pokémon that share a family with official Pokémon|Glitch Pokémon family}}
{{redirect|Hybrid|the glitch Pokémon in Generation IV|Generation IV hybrid}}
An '''unstable hybrid Pokémon''' is a Pokémon in either [[Generation I]] or [[Generation II]] that simultaneously has the properties of two different species of Pokémon. An unstable hybrid Pokémon is composed of a "recipient" Pokémon—the Pokémon it truly is and will revert back to—and a "donor" Pokémon. This is due to there being two species addresses for the player's party Pokémon in Generation I and II. The first address manages data for the "donor", whereas the second address manages data for the "recipient".

In Generation I, unstable hybrid Pokémon can be created by the [[Pokémon merge glitch]], [[Rhydon glitch]] and [[Johto guard glitch]]. In the Japanese versions of {{2v2|Gold|Silver}}, unstable hybrid Pokémon can be created by the [[Bug-Catching Contest data copy glitch]].

==Properties==
The properties of unstable hybrid Pokémon differ between slightly Generation I and Generation II.

===In {{3v2|Red|Blue|Yellow}}===

In Generation I, an unstable hybrid Pokémon displays the sprite, mini-sprite and type of the donor Pokémon, and evolves in the same way as it. It has the original name, learnset, TM/HM compatibility and effective typing of the donor Pokémon.

An unstable hybrid Pokémon has the color palette of the recipient.

===In {{3v2|Gold|Silver|Crystal}}===

In Generation II, an unstable hybrid Pokémon displays the sprite outside of battle, the minisprite, and type of the donor Pokémon, and evolves in the same way as it. An unstable hybrid Pokémon also has the learnset of the donor, the TM/HM compatibility of the donor and a gender outside of battle calculated based on the donor.

An unstable hybrid Pokémon has the sprite in battle, gender in battle and effective typing based on the recipient.

==Stabilizing==
Stabilizing an unstable hybrid Pokémon is the act of causing both Pokémon species bytes to become the same. The Pokémon may retain changes that happened to it while unstable, such as the Pokémon knowing normally impossible moves. To stabilize an unstable hybrid, a Pokémon can be evolved (in the way the donor would), traded to Pokémon Stadium 2 (this makes both species bytes match the recipient), or deposited and withdrawn from [[Pokémon Day Care]] (this makes both species bytes match the recipient). In both Generation I and Generation II, if an [[evolutionary stone]] is used the 'ABLE/NOT ABLE' message is shown is based on the recipient Pokémon, but a donor Pokémon that can be evolved by the relevant stone will still be able to evolve even if the 'NOT ABLE' message is shown. An unstable hybrid Pokémon cannot be traded to Pokémon Gold, Silver, or Crystal; once stabilized, the Pokémon can be traded to the Generation II games.

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==Glitches which create unstable hybrid Pokémon==

===Bug-Catching Contest data copy glitch===
{{main|Bug-Catching Contest data copy glitch}}
Performing this glitch allows the player to receive mainly a full copy of the last Pokémon, but with the second Pokémon species as the donor and the last Pokémon species as the recipient. 
===Rhydon glitch===
{{main|Rhydon glitch}}
When a [[Glitch Pokémon family|glitch Pokémon with an invalid Pokédex number]] (valid numbers are 1-151) has a Pokédex entry displayed after capture and is sent to Bill's PC, it will become a hybrid with {{p|Rhydon}} (it is the recipient, Rhydon is the donor).
===Pokémon merge glitch===
{{main|Pokémon merge glitch}}
When [['M (FF)]] or [[Q◣]] is used to merge two Pokémon together, the result is an unstable hybrid of the two species.

===Johto guard glitch===
{{main|Johto guard glitch}}
When a Pokémon is hidden by [[Five question marks#Hex FF|????? (FF)]] to bypass the [[Time Capsule]] party check and traded to Red, Blue, or Yellow, it will be a hybrid of the equivalent Generation I Pokémon (as the recipient) and [['M (00)]]{{sup/1|RB}}/[[3TrainerPoké $]]{{sup/1|Y}} (as the donor).

===Cloning glitch===
When cloning Pokemon by exploiting the computer storage system in [[Generation II]], there is a chance to get a [[bad clone]]. This Pokemon is an unstable hybrid of the Pokemon you cloned and [[?????]].

==Using unstable hybrids to level past 100==
If the donor and recipient Pokémon have different [[experience]] groups, the unstable hybrid can level past 100, or drop down levels if the donor Pokémon was level 100. If the donor Pokémon requires more experience points to reach level 100 than the recipient, the hybrid can be leveled up until it reaches the amount of experience the donor would require. If the donor Pokémon requires less experience than the recipient to reach level 100, then the hybrid will level down to the level it would be in the recipient's experience group if it had the amount of experience the donor requires at level 100. Stabilizing the hybrid will preserve the level.

This occurs because the amount of experience is capped to the donor's experience group's maximum amount of experience, but the levels are calculated using the recipient's experience group.

==Using unstable hybrids to make your Pokemon have unusually high stats==
You can make your Pokemon have unusually high stats by catching the glitch Pokemon [[X ゥ- xゥ,]], who's stats reach around 400 each by level 100, and fusing it with one of your Pokemon so that X ゥ- xゥ, is the recipient and the Pokemon you want to make stronger the donor.

==Using unstable hybrids to train Missingno.==
Normally, (at least in Pokemon Yellow), [[Missingno.]] cannot be trained above level 1. However, if you fuse Missingno. with another Pokemon, so that Missingno. is the donor, you can level the resulting hybrid Pokemon as much as you like, even above level 100 using the method above. 

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