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 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 [[Time Capsule exploit]]. In Generation II, unstable hybrid Pokémon can be created by the [[Pokémon merge glitch]], or in the Japanese versions of {{2v2|Gold|Silver}} by the [[Bug-Catching Contest glitch]].