you have to see every Pokemon in sinnoh then go to professor rowan and he will give it to you
Get the National Pokedex by seeing every Pokemon in the Sinnoh Pokedex
it depends on what you have on your pokedex Yu need to see all 150 Pokemon on the sinnoh dex to get the national dex, some of the Pokemon can only be seen from the Elite Four.
Yes, but you need to get the national dex first by beating the elite 4 once
see all the Pokemon in sinnoh region go to pro birch and he will give you national dex
Beat to elite four and receive the national pokedex (to receive the national pokedex your must at least see all of the Pokemon in the sinnoh pokedex that you have already).
After the elite four, you fill up your sinnoh pokedex (by seeing all the Pokemon in sinnoh), and then go to Sandgem town, and talk to professior rowan in his lab, to get the national pokedex, and then explore the island that you take the boat from snowpoint city to get to, and fill up the national dex
After the elite 4 (in Pearl Diamond or Platinum) you need to go into the big room and find Cynthia and defeat her and go to professeur and get the national if you have seen all the Pokemon in the sinnoh dex
You need to get the national pokedex, which means that you need to see the 150 Pokemon in the Sinnoh pokedex.
He will be gon forever when u beat the elite 4 ANSWER: i beat the elite 4 get the national dex and caught all sinnoh and national dex Pokemon and he is still there so idk if he ever goes on break
fill in the sinnoh pokedex and then the national one
To get the National Pokedex, you must have seen all Pokemon from the regional Sinnoh Pokedex after beating the Elite Four and Champion. After doing that, go to Sandgem Town and talk to Professor Rowan in his lab and you will get the National Pokedex.
After beating the Elite 4 and completing the Sinnoh Pokedex you go there its south of veilstone city and you can find the great Giritina there at lvl 70