i completed mine by battles in the battle frontier and exploring the wild.
i couldn't find a misdreavus and that was my ownly Pokemon so i traded with a friend with pearl and then gave it back so it registered in my pokedex.
hope this helped x
Pokemon #80 in Sinnoh pokedex is Barboach.
vfrt in the pokedex for sinnoh #111 in the pokedex is a garchomp
then you have done the game.
You get the sinnoh one basically after starting the game, the you get the national pokedex when you´ve completed the sinnoh pokedex (by seeing all the Pokemon in sinnoh)
Unown is the Pokemon that comes after Snorlax in the Sinnoh Pokedex.
www.serebii.net they have a pokedex
There is only one legitimate way to complete the Sinnoh Pokedex. To complete the Sinnoh Pokedex you must trade for the missing Pokemon with Pokemon Diamond, Pearl or Platinum.
Sinnoh pokedex- rotomNational Pokedex- Psyduck
The sinnoh pokedex can hold up to 150 pokemon.
After you go to the Pokemon lab for the first time, Professer Rowan will ask if you would complete the Sinnoh pokedex. Answer "Yes". He will give you the Sinnoh pokedex. If I didn't answer your question right, try Psypoke.com If you don't have Pokemon Pearl/Diamond/Platinum you can't get the Sinnoh pokedex.
Registeel is not in the Sinnoh Pokedex. :)
u get 134 Pokemon in sinnoh