>>43616370there are Johto Pokémon in Kanto though, in GSC and HGSS which take place after the events of Red and Blue.
But let me talk about how stupid the anime is. It seems like Oak and other characters knows about all the future regions but never mention them in Episode 1.
>Oak has seen Celebi as a kid along with other Gen 2 mons. > When Team Rocket get to Hoenn, Giovanni wants Team Rocket to explore the region because he already knew about Team Aqua and Magma>James lived in a mansion in Sinnoh and even had a Carnivine. >Professor Juniper is an old friend of Oak>Serena met Ash as a kid in Kanto meaning there were people from Kalos being able to get in the region and back>Oak has a cousin in the Alola region.I'm sure I probably got one of those details wrong, but it just keeps happening, it's like they really don't care about consistency. Do Oak and the others know about 30 regions all this time?