For example, I found a Dragonite at the Hidden Grotto, it had its HA (Multi Scale) and I had an Adamant Synchronizer. Can I SR to get it with an Adamant nature, perfect IVs and shiny?
What Im asking for isn't the chances, but if it's possible to change the IVs, nature and shininess of the Dragonite? Another question that I'm consufed about is if it's possible to find a shiny at the Hidden Hollow?
>Pokémon in the Hidden Grotto cannot be shiny and the contents are set when regenerated, they cannot be soft reset. Natures of the Pokémon, however, are soft-resetable
Pretty much says it there :)