The first rule is that if one of Pokémon which can be a Ditto - such as Diglett - appears in its shiny form when you attempt to catch it, this Pokémon will not transform into a Ditto.

Shiny Ditto has a 1 in 64 chance of appearing ... Furthermore, Ditto can transform into the first Pokemon it meets in battle when used in Gym attacking or defending. This transformation will ...

Ditto is an elusive Pokémon in Pokémon Go, as it disguises itself and you can’t actually just catch one straight-up. In order to find Ditto, you’ll want to find the Pokémon that it ...

Opposed to other Pocket Monsters in the game, which appear on the map just as they are, the Transform Pokémon ... Pokémon Go players can find a Shiny Ditto by catching one of the Pocket Monsters ...