In the Pokemon Series, pretty much every duo of games take place in a new region, with pokemon that were never seen/mentionned before.

That world seem to have communication over distance (the games seem to often have something that functions like a cell phone), and they seem to just say 'different regions, different pokemon' and move on.

But is there any given reason why no professor in later regions just give a call to Prof. Oak telling him that he screwed up limiting his pokedex to 151 entries? Would be like if a Scientist living in Canada; dedicated his life to knowing different animal species; but had no clue Lions exist.

  • 1
    I think the biggest problem isn't that the Pokédex is limited to 151 entries, but that it starts out completely empty. – Nolonar Mar 8 '18 at 15:36
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    This treads very closely to developer intent. The games are treated as separate entities, except for sequels. I don't believe lore has any place in this. – Frank Mar 8 '18 at 17:18
  • I always interpreted the "there are ~150 Pokemon to catch" premise as just for our benefit as gamers; we weren't being teased with possibility of there being numerous more Pokemon that were impossible to catch because they came from beyond the game's location. – user200816 Mar 9 '18 at 8:39

I challenge the premise that the regions don't communicate, but first we need to talk about parallel universes...

In all seriousness though, each major revision of the base game has brought with it some minor retcons to the story, as well as running some stories in parallel to previous games.

There is an extensive chronological history of events that happen before and during the games. Some entries list NPCs and Professors moving or traveling to different regions for study purposes. Some protagonists (and their parents) also travel into their new region before beginning their journey, such as Brendan/May in Gen 3, and Sun/Moon in Gen 7.


In fact, Generation 2 confirms that Professor Oak is friends with Kurt (the Pokeball maker from Johto's Azalea Town), as well as Professor Elm, who actually used to be Oak's assistant. At Kurt's place there is even a picture of Kurt with "a young Prof Oak", and on Elm's lab computer you can read an email from Prof Oak to Elm.

There is also the addition of the train line between Kanto and Johto, as well as the ferry, allowing for ease of transport and commuting between the regions.


Regarding the Pokedex, note that Professor Oak never says that there's only 151 Pokemon in the world:

...This world is inhabited by creatures called Pokémon! For some people, Pokémon are pets. Other use them for fights. Myself… I study Pokémon as a profession.

Sure, we know that there was only 151 Pokemon in the Pokedex, but that was because it was a "Generation 1" device, a first attempt at an encyclopedia:

On the desk there is my invention, Pokédex! It automatically records data on Pokémon you've seen or caught!

Pokemon Storage

Indeed, if we look at the Pokemon PC Storage solutions, most of the regional technicians were in close contact:

Your storage system offers more convenience than mine. It has a lot of user friendly features that make it fun and useful too. It makes me proud that I played a part in its development. Here's hoping that you'll continue research in Storage Systems.
- Bill, to Lanette as an email in Lanette's lab

Bebe (Generation IV) based her storage design off the previous iterations:

It was she who developed Sinnoh's Pokémon Storage System based on the previous designs of Bill and Lanette...

and she appears to be friends with Bill:

..After the player obtains the National Pokédex, she will give him or her a level 5 Eevee in Diamond and Pearl. This Eevee came from a good friend in Johto (Bill) before being passed onto the player.
Bebe - Bulbapedia

This is only a few examples, but I believe it helps prove that the major game regions do in fact communicate, share ideas and collaborate on research. While early games may have had a limited number of Pokemon available, I think we can just chalk that up to the real-life development of the games - in universe, all the Pokemon were always there, just waiting to be found, caught and catalogued.

After all, isn't that the whole point of giving a bunch of kids Pokedexes and sending them out on an adventure in the first place?

  • Well, your mom (in the game) is single and lives right next to the Prof. lab... – Fredy31 Mar 9 '18 at 14:44
  • I always found the theory that Oak just sends you, a child, look for pokemon to get some alone time with your mom pretty funny. – Fredy31 Mar 9 '18 at 14:45

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