Like if the flute had been released, would the coding allow a shiny Arceus to be caught?
Even if the flute is just hacked in, the Arceus should be able to shine. There's no shiny lock for it.
It'd be such a slap in the face to the gamer, I didn't know if they'd prevent it from happening. It'd be like, 'hey look here's 2 shiny pokemon, but you have to knock one out. HAHAHA!!!'
That actually happened to someone in the shiny thread. No, not me
Anyway, when encountering 2 pokemon in doubles grass, is the change of one of them being shiny effectively doubled?
I know that each Pokemon's shiny chance is calculated separately, but I'm bad at math, so I'm not sure about the exact amount, but I'm sure it is certainly isn't doubled.