According to
The Silph Road, there are some features will be involved with the upcoming promotions. Of course, some of the features are concluded from codebase.
Sound File For Next 100 Pokemon
Sound files for the next 100 Pokemon have been added to the game including some Gen 2 Pokemon. In fact, we now know it will include Gen 2 Pokemon because it reveals sound files for Pokemon numbered 1-251. This is a major indicator that Gen II may be just around the corner, travelers. Pokemon Go never officially released all 151 of the Gen 1 Pokemon into the wild, but it is believed that some of those, like the legendary birds for example, are being saved for special events.
Shiny Pokemon Variant
Even more code has been added to enable shiny Pokemon in Pokemon Go! For those unfamiliar, in the mainseries game "shiny" Pokemon are simply re-colored versions of Pokemon. They are extremely rare. Every Pokemon comes in one shiny variant. They are identical to their normal-colored counterpart in every way except appearance.
It is abundantly clear that 'shinies' are an intended mechanic for Pokemon Go. Shiny Pokemon are also usually stronger than the average variant of a Pokémon, which makes them perfect for breeding or battling.
Pokemon Gender
It appears that Pokemon may soon begin having a GENDER associated. Both Male and Female gender identifiers appear to be in the works.
Trainer Customization
Other items revealed include new customization items for trainers and costumes for Pokémon, both of which appear to be microtransaction-based additions. On the trainer side, it’s very possible that some of the customization options will be free, but there is definitely a section marked Purchasable. Luckily, there are ways to earn Pokecoins in game and without paying a single dollar.
Pokemon Costumes
As for costumes for Pokemon, it appears to have been built in a way that would enable different 'types' of costumes, such as the "HOLIDAY" type. According to report, some of the costumes will even have collision physics, meaning they will appear in battles and on-screen prompts.
Maybe we can see some of these in next official release notes of Niantic. We're all looking forward to the upcoming update.
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