Taking place more than two years after the events of the original Naruto series wrapped up, Naruto: Shippuden follows Sakura and Naruto's journey. The main plot of Shippuden is Team 7 trying to seek out Sasuke and bring him back to the Hidden Leaf Village.
The last time we saw him he and Naruto had a massive fight at the Valley of the End and Sasuke left to join Orochimaru and receive more training to learn how to use his curse mark. Even though Naruto: Shippuden is highly praised, even higher than the original Naruto anime run, it isn't without some seriously weak episodes here and there. These are the ten worst-rated episodes of Naruto: Shippuden according to IMDb.
10 Episode 447 - Another Moon
This episode, like many on this list, is from one of the long filler arcs that took place within an Infinite Tsukuyomi. The entire arc is mostly a rehash of the pivotal moments from the series except in an alternate universe.
This means many of the characters have different personalities or events that may be slightly altered since it's not technically a total canon interpretation but an altered dimension. In this episode, Pain is attacking the village and Naruto gets trapped by him. Fans were disappointed to see so many scenes they had already watched with repeated battle moves and strategies.
9 Episode 437 - The Sealed Power
This is another episode taking place within a dream that Jiraiya wrote within the novel in his dream world. People were not happy about the Jiraiya scroll episodes continuing onwards for such a long stretch of filler. But there are some interesting subtle differences. Sasuke was changed slightly in the opening for this episode, for example.
Plus, for fans of Jiraiya and Naruto's relationship, some people were happy to see the two of them together again even if it was all just inside of a dream. But ultimately, this was another boring episode that offered little interest to fans or the canon universe.
8 Episode 429 - Killer Bee Rappuden Part 1
The best part about this episode was Itachi showing up but as one of the most interesting parts of the episode, his character was limiting taking away from most of the enjoyment. Killer B is already a controversial character with many fans finding him more annoying than anything else.
It was difficult for them to watch filler episodes about his dreamworlds although some fans were pleased by the humorous elements. There was also a strange change to the tailed beasts animation that people weren't thrilled with. To make matters worse, for some reason, the writers decided it was a good idea to stretch the Killer B filler into two full episodes.
7 Episode 435 - Order of Priority
This episode continues the fight between Shikamaru's team and Jiraiya's team. It also offers a somewhat interesting antagonist who has the ability to use Byakugan and this allows Neji to come into the spotlight more. But ultimately, it's another episode in a stale filler arc that does little to appease fans.
Even the addition to popular secondary characters into more central roles isn't enough to save the episode that is mostly dull. It does set the groundwork for a better follow-up episode that might even contain a more interesting and action-packed battle for the most part, it's worth skipping the episode (and the arc) altogether.
6 Episode 448 - Comrade
In the aftermath of a dangerous battle, everyone is left to pick up the pieces. Sakura helps heal Hinata, Naruto grows frustrated by the lack of power he has been receiving from the nine-tails, and Sasuke still begins to transform into a villain even with his parents still alive.
It appears in the dreamworld, Sasuke is edging towards becoming the Madara character. He still intends to destroy Konoha. First, he wants to kill Orochimaru, but he is unable to due to being poisoned. Naruto cannot control his chakra. Again, another filler episode in a very long filler arc that doesn't seem to improve the longer it goes on.
5 Episode 430 - Killer Bee Rappuden Part 2
This is the second part of the infamous Killer B dream and filler episode. Still part of the odd dreamworld/Jiraiya's scroll arc, this episode is a direct follow up to part one of Killer B's story. This episode does feature the return of fan-favorite characters like Itachi, Sasori, and Deidara, but again, they're featured in such limited roles it's hard enough to make up for the weakness of the overall storyline.
This is an episode where you can clearly see how lackluster the filler animation is as well with some awkward choices in depicting certain sequences. This episode ends with the Akatsuki being attacked by the tailed beasts and Killer B happy about it from his dream world.
4 Episode 434 - Team Jiraiya
This is one of the early episodes in the much-reviled Jiraiya scrolls filler arc so it's not at all surprising that it would rank as one of the worst episodes of Naruto: Shippuden. Tsunade continues to read from his novel and in doing so we slip again inside the dream world being manifested by her reading.
We get to watch Naruto defeat Hidan in this episode and then a massive sinkhole opens up that threatens to take hold of the village children. Jiraiya goes after the children and down into the sinkhole to save them. Ino and Choji try to jump in after him but Shikamaru prevents them from doing so.
3 Episode 376 - The Directive to Take the Nine-Tails!
This episode is the first half of the Mecha-Naruto arc. It is more filler! No surprise there. Orochimaru creates a massive mechanical version of Naruto, one that can harness his nine-tails chakra. It makes him a nearly unstoppable enemy. Even Kakashi is no match for Mecha-Naruto.
The bulk of this episode is about Orochimaru's creation and how he went about experimenting and constructing the Mecha-Naruto, whereas the follow-up episode details the actual battle between Mecha-Naruto and the real Naruto. This Mecha-Naruto arc is definitely the most hated of all the Shippuden filler arc, even more so than the dream world and Jiraya's scroll arcs.
2 Episode 449 - The Shinobi Unite
You guessed it, it's yet another episode from Jiraiya's scroll filler arc. It's actually a little surprising this episode ranked so low compared to the rest because it is full of exciting battle sequences. The shinobi of Hidden Leaf band together to bring Sasuke back to Konoha now that he has killed Orochimaru and is working with the Akatsuki.
They want to deal with him themselves before anyone else can. But it won't be easy. They are forced to fight against Sasori and other powerful Akatsuki members. The reason this episode is probably ranked so low is that almost all the battle sequences are rehashes of the canon battles. Nothing new or original is introduced in this episode rendering it mostly pointless.
1 Episode 377 - Naruto vs. Mecha Naruto
Finally, an episode not part of the infamous over-extended Jiraiya novel/Tsunade's dream filler arc! Yet it is still a filler episode. It's a very strange one, at that. This is another filler arc with multiple episodes although, thankfully, not nearly as many as previous filler arcs. It involves a giant, mechanized version of Naruto created by Orochimaru to attack the Akatsuki and disrupt their plans.
One has to wonder what the writers were thinking when they decided to throw in a giant robotic version of Naruto to fight against himself. The other shinobi attempt to take down Mecha Naruto but ultimately it is Naruto himself who has to face off against the mecha version.