Yes.
Well, if you trade, it should go into your pokedex.
Yes.
no but if you don't have the second pokedex you carn't trade any Pokemon so if you only have the first pokedex you can only get the Pokemon from diamond and pearl Pokemon.
get it in a trade
Unfortunately, you have to catch, trade, or somehow own every Pokemon in the pokedex. If you had it at one time and traded it, it still is in your pokedex.
You need to trade a Chikorita from Pokemon heartgold or soulsliver
No
You have to trade with firered or leafgreen to get the national pokedex.
trade or catch one
You need to trade it from the game "Pokemon ranger"
No, you can only migrate when you get national PokeDex.
This is an upgraded version of the pokedex you will get this after becoming pokmeon champion as long as you recorded 60 species of Pokemon in the pokedex.