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Roaming Pokémon IV glitch: Difference between revisions
Thanks Ownagemuch for your link.
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{{Bulbapedia2|Roaming Pokémon glitch}}
The '''Roaming Pokémon indvidual values issue''', sometimes referred to as simply the '''Roaming Pokémon glitch''' refers to an error regarding the possible range of [[bp:individual|individual value]] totals of [[bp:Roaming Pokémon|Roaming Pokémon]] within the first four handheld Pokémon games; namely Pokémon Ruby, Pokémon Sapphire, Pokémon FireRed and Pokémon LeafGreen. It does not exist in the later gaames, such as Pokémon Emerald. The [[glitch]] although perhaps less noticeable to less experienced players, restricts Roaming Pokémon such as Latias, Latios or the [[bp:Legendary Beasts|Legendary Beasts]] from having an IV total greater than 38. Specifically, the affected Pokémon would always have 0 IVs in the Special Attack, Special Defence, Defence and Speed stats and a maximum 7 IVs in the Attack stat, the individual value for HP however, remains unchanged.
==Technical explanation==
Information for the individual values of a Pokémon is read in a [[qword]] (a total of 32 ONs in [[binary]]) or {{Explain|four bytes| As the Pokémon games and most software today use eight bits for every byte}}. Hence the permutations of the individual values a Pokémon has is denoted by 11111111111111111111111111111111 or a total of 4294967296 possibilities, including a Pokémon with a 0 IVs for every stat. When the player encounters a Roaming Pokémon however, an oversight by Nintendo was that only the last byte is defined (the last eight bits). By default, if the other bytes for the individual values are not defined every other bit is taken as 0. Therefore, the permutations are reduced to just 11111111 or 256. HP was the first stat in the data structure so it remains unchanged, but the other stats except Attack remain undefined but the Attack IV can only be an integer between 0 and 7.
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