Talk:Episode XIV: Jack Learns to Jump Good/@comment-24053170-20190411031026/@comment-24053170-20200612183835

He said it when explaining what happened at the end of the episode, he said that Jack successfully defeated Aku the second time he reached the portal, and that Jack finished his quest at that point.

Also the only other episode where Jack demonstrates the ability to Jump Good (ie Jack and the Sirens) happens before the events of episode's final scene.

He explained it an interview.

So continuity wise, this is technically the final episode. And everything else is just storyline filler.