Yes you do unless you want to do a lot of trading instead.
Every Pokemon from any other games including the old ones.
Unlike in other games you just have to see the Pokemon not catch them but when professor oak gives you the natinal pokedex you have to catch the Pokemon
There is no other pokedex.
It depends on the Pokemon you're trying to evolve. While some Pokemon can evolve without any problems due to being in the regional Pokedex, other Pokemon (Golbat, for instance) won't evolve without the National Pokedex. Note that this is only the case in FireRed and LeafGreen - in later games, Pokemon not in the regional Pokedex will evolve, but won't be recorded until you get the National Pokedex.
u have to go to events and go to pal park to migrate from other games
you got to migrate and trade from other Pokemon games or talk to dawns sisters and the Pokemon manchine owner and the will have talked about Pokemon that is not in the region you is in
In the National PokeDex, Dusknoir (Ghost-type) is the Pokemon whose number is 477. No other Pokedex will have that many Pokemon.
You need to collect every Pokemon in the National Pokedex - in other words, complete the Pokedex.
Cheat. use a action replay or a revoulution 4 (r4)
In diamond is TENTACOOL but I am not sure about in other Pokemon games. In diamond is TENTACOOL but I am not sure about in other Pokemon games.
No,but there are other cheats to do it.
nope