Once you have seen all the Pokemon in sinnoh go and speak to professor Rowan in his lab he will give it you.
FLORMAROLA TOWN (Must have shamin in your prty)use an event for shamin) natinal pokedex
first get natinal pokedex. then put in a gba game into your ds.turn your ds off when you start go to migrate then go to pal park and catch them
You need to see all 210 Pokémon in the Sinnoh Dex. Once you do, talk to Rowan and Oak will come in and give you the National Dex upgrade.
You might find that Route 225 is blocked to you in Pokemon Platinum. In order to open it, you have to complete your first Pokedex.
that is because it might be a POKeMON that ain't in the sinno dex and u can go in there without natinal ignore that answer I think because it is a fight that doesn't have exp it's kind of a special fight and so they just don't show up. Which is a bit of a B*gg*r really... Well, it's because they want you to go in wi-fi and trade Pokemon to get them in the pokedex, and because here the Pokemon you could get in a trade are here they take your pokedex during battles...
you can foud ivsaur in Pokemon diamon in route 225 for your natinal pokedex
mostly trading
get a bubasour
The first Pokemon in the national pokedex is a bulbasaur
484-500
The Pokemon Mothim is number 47 in the pokedex(will be different in the natinal pokedex.Hope it helped:)
he should be in turn back cave after you get the natinal pokedex =)
get 60 in your pokedex and go to oaks lab
by seeing all 150 sinnoh Pokemon including palkia.
yes and no yes when obtained in trade no when tried to catch
Mew three is an exclusive to chaos black
shear pillar but you need the natinal pokedex sorry if i spelled stuff wrong