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1 vote

Right when the Pokemon is encountered? Is it the same for roaming Legendaries?

Notice how the question says 'when'.

3 Answers

2 votes
Best answer

A Pokemon's chance of being Shiny is determined as part of it's personality values, which means this gives your answer:

>A Pokémon's personality value is an unsigned 32-bit integer that is created when the Pokémon is first encountered; it is set as soon as the Pokémon appears in the wild, the Pokémon's Egg is received from the Day Care man or another NPC, or the Pokémon itself is received from an NPC.

So yeah, as soon as the Pokemon is encountered.
This is no different for roaming legendaries.

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Ok, the clear explanation I was looking for. Thanks Fizz :D
No worries. :)
0 votes

From my experience, it is random.

Here is the link, please read the box at the top. It will probably answer this question better than I can.

0 votes

Whether a Pokémon is Shiny or not depends on the values of the Trainer ID number, secret ID number, and personality value.

They are determined by their personality value, which are binary, making it 1/2^13
Personality value also determines Pokemons nature, burmys evolution, spindas dots, unowns letter, ability, and gender

Source with more info: http://bulbapedia.bulbagarden.net/wiki/Personality_value

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