This cartoon is one of my favorite series. If you haven’t seen it yet you should watch that really.
Jack learns all martial arts to defeat evil Aku but Aku is so smart. He is sending Jack to future and in this future Aku has everything.
Good musics, perfect simple backgrounds, and great allusion to famous films and stories. I highly recommend this series. He has a very strong sword. This sword is the only thing that you can use to kill Aku.
Some episodes are really original.
You can see Samurai Jack and Aku in this picture.
I think Aku is a original character. He is introducing himself with these words
“I Aku, the shape shifting master of darkness.” He can shape shifting as you can understand.
And Aku sometimes cheats poor Jack thanks to this power.
Unfortunately this series removed from broadcast. What I mean there is no final episode. When I watched all episodes, I was really sad for that. It was a nice cartoon.