A lot of players of "Pokémon GO" across the world are close to catching most of the first generation (Gen 1) Pokémon excluding the legendary creatures. The developer, Niantic Labs, thinks that the trainers are ready to catch new Pokémon from the second generation (Gen 2) in a future update.

Even though the legendary Pokémon have not been released yet, gamers are only limited to catching up to 151 creatures in the mobile application. As mentioned in reports, Niantic Labs is planning to expand the Pokedex by including the Gen 2 Pokémon. This will surely give players more challenges in completing their Pokedex.

The Gen 1 Pokémon only included the creatures from the original games "Pokémon Red" and "Pokémon Blue." Furthermore, the Gen 2 Pokémon first appeared in the second installments of the franchise, which are "Pokémon Silver," "Pokémon Gold," and "Pokémon Crystal." It also featured new types of creatures such as the pre-evolved forms of some of the Pokémon in Gen 1. This included Pichu, which is the pre-evolved form of Pikachu. Other pre-evolved Pokémon from Gen 2 are Igglybuff and Cleffa.

New starter Pokémon were also introduced in Gen 2, which are Totodile, Chikorita and Cyndaquil. There will be new evolutions for Eevee as well, such as Umbreon, a dark type, and Espeon, a psychic type.

There are speculations that Niantic Labs will be adding more region-exclusive Pokémon from Gen 2. These are Pokémon that can only be caught in certain regions of the world. For example, Kangaskhan can only appear in Austrailia. Furthermore, there are rumors that Heracross will only be caught in Asia. Meanwhile, Delibird and Smeargle can only appear in Europe and South America. 

Aside from new Gen 2 creatures, many fans are also expecting that the legendary Pokémon will finally be available in the upcoming update. The Gen 2 update of "Pokémon GO" is rumored to be released on May 2017.