after getting the national dex you be able to find him in pal park then he will go off to Eterna city to the empty house that's to the left hand side of the Eterna city gym.
You must see all the Pokemon in sinnoh and get the national dex. then prof oak will give it to you
You need to obtain the National Pokédex from the Prof. Oak first.
his house is in eterna city right next to the gym. hoped this helped
you will know it by catching every single Pokemon in the game and by finding all the Pokemon if you found and caught everything then go to prof. oak or prof. rowan.
after you beat the Pokemon league you need to finish the pokedex and thengo and see prof. rowan in his lab, prof oak, will then give you the national pokedex
Look In all the Towns And Iron Island And the Pokemon League! PS. also Check The safari Zone And after you Find all 210 Pokemon, Talk To Prof. Rowan and Prof. Oak Give You The National Dex After His Talk With Prof. Rowan. P.P.S also Go to the gyms And Battle the trainers there!
Rt. 212 North, but I think you need the poke radar which you get after seeing every Pokemon in sinnoh and talking to prof. oak
you have to see all of the Pokemon and then you get the national pokedex from Prof. Birch and Prof. Oak in Prof. Birch's lab after completeing the Sinnoh pokedex.
Prof. Rowan does as your starter . U can choose piplup, turtwig, or chimchar
you only get 1 from prof. Oak
You'll get Rock Climb from Prof. Oak when you have defeated all the Gym leaders in the Kanto region. Prof. Oak is at the laboratory in Pallet Town.
For event items to work, you need to have completed the Sinnoh Dex and received the National Dex from Prof. Oak.