see every Pokemon
You have to trade with firered or leafgreen to get the national pokedex.
trade
beat the Pokemon league.
beat the elite four once
never leafeon is NOT in the kanto pokedex anyways there is no national pokedex
The national is the National Pokedex. This pokedex allows you to catch/see new pokemon. You'll also get to go to 4,5,6, and 7 island.
get firered or leafgreen and migrate it to pearl after national pokedex
trade it from ruby sapphire or emerald after getting the national pokedex.
you find in snow point temple after you get the national pokedex
You go to route 228 after you get the national pokedex and migrate Pokemon from leafgreen
in peral/diamond you have to get the national pokedex in firered/leafgreen you can catch it in the later stages of the game
Catch a few meoth and phanpy depending on if you have the national pokedex