Instead of canceling the show, Studio Pierrot created a featuring a Devil-worshipping cult and a retconned "Dark Disciple."
While not "filler" in the plot sense, these structural repetitions make the first 30 episodes feel like they are 51% recycled content. Viewers conflate "slow pacing" with "filler." Once the show hits the Seabed Temple arc (Episode 40), this problem vanishes, but the damage to the show's reputation was already done. The most brilliant decision Black Clover made was ending the anime.
This is the rarest move in long-running shonen: how much filler does black clover have
Let’s break down the numbers, the quality, and the legacy. First, let’s get the clinical definition out of the way. "Filler" refers to content not found in the original manga—episodes created solely to allow the manga to get ahead.
Similarly, the anime expands the "Royal Knights Arc" with a prolonged training camp (Episodes 80-84) that teeters on the edge of filler. While some character moments (Luck vs. Magna) are good, the obstacle course feels like busy work. Here is where Black Clover outsmarts the traditional filler model. Unlike Naruto ’s "Ostrich Ninja" episodes (which are entirely non-canon and never referenced again), Black Clover uses expansion. Instead of canceling the show, Studio Pierrot created
The short answer is: But the long answer is far more interesting. It involves the collapse of a studio’s schedule, a canonical time-skip, and the philosophical difference between "filler episodes" and "filler pacing."
The problem was never the filler. The problem was the recaps. Once you skip the first 30 seconds of every early episode and ignore the beach volleyball match, Black Clover is one of the leanest, meanest battle shonen ever put to screen. This is the rarest move in long-running shonen:
The anime is the definitive version of the Elf Reincarnation arc (Episodes 92-119). The "filler" added to those fights—particularly Yami vs. Licht and Asta vs. Ladros—is superior to the source material. Conclusion: The Gold Standard of Long-Running Anime Black Clover proves a radical thesis: You can run a 170-episode shonen with almost no filler if you are willing to end the show.