you can't
back to sinnoh
Sinnoh.
No there is no way to get to Sinnoh.
No. You cannot go to any of the previous regions in this game.
You cant.
I think your talking about HeartGold/SoulSilver. In Pokemon HeartGold/SoulSilver you're not capable of going to the Sinnoh region, only Jhoto and Kanto are avaliable.
You dont
you cant go to sinnoh you have to stay in that regin
You can't. After beating N at his castle and obtaining the National Dex, you can catch Pokemon from Sinnoh.
What Do you think? ITS FREAKIN Pokemon BLACK AND WHITE AS IN ONLY UNOVA!! You want sinnoh pokemon, just beat elite four and go on East side to get 1st-4th gen pkmn.
Yes, but you need to get the national dex first by beating the elite 4 once