We just learned about some more big changes coming to 'Pokemon Go'

More references to "shiny" Pokémon have been uncovered, which are especially rare versions of existing Pokémon in different colors from the original games.

Shiny Pokémon will likely be hard to find and seen as collector items, as they were in the traditional card-collecting game.

The Silph Road has found more code references to trainer customization, which should let you change aspects of its physical appearance for free and possibly through in-app purchases.

A "holiday" costume reference for Pokémon has also been found, which coincides with the recent announcement from Niantic that said more was coming to the game around the December holidays.

There's no direct evidence to support that new Pokémon are being unleashed in the game soon, although references to the few Legendaries and second generation of creatures are still in the code base.

"It may be that Niantic is sorting out shiny Pokemon and genders before introducing Gen 2," according to The Silph Road.

Niantic has a big announcement planned for Pokémon Go on December 12, so we'll know more then.