I say you should watch it all. Despite what others say, you might be surprised to find out that the Unova saga isn't that bad at all. I stopped watching at the DP saga because I thought the new dub voices were awful. But I decided to give the series a second chance and I honestly was surprised how good the new series is still is. I've seen almost every episode of the Rival Destines season. Pokemonepisode.org/ and watchpokemonepisode.com are good sites find them, they have all the episodes that have been dubbed so far.