You need to find someone who has them so you can trade.
you need to find 210 Pokemon to complete the pokedex
U Will Need Gameshark Codes To Complete The Pokedex In Pokemon Emerald.
Since Victini is numbered #000 in the Unova pokedex, I'd say yes, you need or see Victini in order to complete the pokedex
you have to complete the sinnoh pokedex and get the national pokedex hope i helped :P
too bad.trade it.
You need to collect every Pokemon in the National Pokedex - in other words, complete the Pokedex.
You need to complete the pokedex and get the national pokedex then go back there
Yes.
no you just need all the others
You don't need to catch every Pokemon to complete your pokedex you need to just see them but you can catch all of them if you want to.
no it's not true. all you need is cut and some ultra balls. go to eterna forest and there should be a secret spot where you could use cut to go in. after, there will be a couple rotoms. I'm pretty sure mostly rotoms
Certai pokemons that come from events are not needed to complete the pokedex. Such as: Arceus Mew Deoxis Manaphy etc...