SacredKeldeo500
Pokemon Collecter
He went to the battle frontier in Hoenn. Just not the ones in Sinnoh and Johto. Why didn't he go to the battle Fronteirs in Sinnoh and Johto. Somebody please tell me why. Thanks.
The writers purposely stretched out the tail-end of Sinnoh with that 50 episode gap between the last two Gyms so they didn't have to make a filler arc.
My guess is because:
a) They didn't want Ash to travel through Johto again, for whatever reason.
b) They would have to give Dawn a whole second Contest arc like May got in AG, and there was simply no time for Dawn to get another round of Contests.
I have a good feeling they'll be featured in the latest series coming up...