The Pokemon anime is about to start season No. 20 later this year, sending Ash and Pikachu on their seventh Pokemon quest. The new Pokemon series, Sun and Moon, will pull Ash away from the Pokemon battlefield and into the classroom as he settles down for a prolonged stay in the tropical Alola region.
For those not as familiar with the Pokemon anime, the show is divided into five distinct series. While Ash and Pikachu are central characters throughout the show, each series features new companions, new challenges, and brand new Pokemon teams.
Since Pokemon Sun and Moon will be on Japanese television (and YouTube) in the not too distant future, we feel that it's a good time to give our definitive ranking of the various Pokemon series.
[Note: We did decide to split Ash's Kanto and Johto adventures into separate runs, even though they're technically considered one series.]