>>33241451>>33241458Each series' evil team arc is around 7-8 episodes long, and airs at the last year of its run. And if Akala is anything to go by, Ash will only stay on each island for the trial and the battle against a Tapu, before returning to Melemele for more filler. Hell, he only spent 7 episodes on the island with the most trials. At this rate, he'll finish his main quest (which is the grand trials and not the plot of the SM games) before next June which, you guessed it, would be the perfect time to start the Aether arc.
>>33241433It took him 26 episodes in Kanto, but the Kanto anime might as well be another series; it's different from its successors in almost every way. In the following regions, it took him:
>66 episodes in Johto (gen lasted 3 years)>56 in AG (4 years)>83 in DP (4 years)>50 in BW (3 years)>58 in XY (3 years) 
