How do i get every single pokemon in the pokemon red/ blue game???

Question

i found this game cleaning up and i beat the game in like 2 days and i got mewtwo and i beat the elite four and i dont know what to do next???????

Answer 1

(How to get all the starters)  Have two Red/Blue games and start with Bulbasaur/Squirtle/Chamander on one and the other. Trade both, restart one. Keep doing that and you'll have all three starters!  

Answer 2

ou have to trade certain pokemon to make them evolve as well like Graveller to make Golem and others.

Mke sure you have all items etc.

get two gameboys, one lead and trade them yourselve, thats what i did

Answer 3

There are some pokemon in red version, but not blue, and vice versa. You need both cartridges, and two gameboys.