yes he goes to a new region called the issue region.
The Isshu Region.
The new region probably is called isshu.
Ash will go to the Isshu region. He takes pikachu along and will travel with Iris and Dento.
You can't go to the sinnoh region.
You can only go to the Sinnoh region in the games Diamond, Pearl, and Platinum.
You cannot go to the Sinnoh region in "Pokémon HeartGold" and "Pokémon SoulSilver."
Because wen he got defeated in the Sinnoh League the guy that defeated him told him that he should travel to the Isshu Region,so he took a ferry trip to Isshu!
he goes to a another battle frontier.
Paul is a purple haired rival of Ash in the Sinnoh Region. He treats his Pokemon poorly, and lets go of Pokemon that he thinks are useless. He is stronger than Ash, considering that all of the battles Ash has been in with Paul have ended with Ash losing or them getting a tie. Paul has a brother named Reggie, who is much nicer, and has earned every badge their is to earn in every region except for the badge of the Pyramid in Sinnoh. Paul has also faced Sinnoh's champion, Cynthia, but lost. She gave him advice, but it is hard to tell yet if it has had any affect on him.
no
No.
Ash leaves Hoenn (Battle Frontier) in episode 468: Home Is Where The Start Is and arrives in Sinnoh in episode 469: Following A Maiden Voyage.