Black Clover season 2 has 51 episodes. The earlier season run is commonly listed that way, and the newer comeback season has not yet had its episode count officially fixed in the sources I found.

What people mean by “the new ones”

If you mean the next upcoming Black Clover season rather than the older season 2, the count is still unconfirmed. Current reporting suggests it may land somewhere around 12 to 24 episodes , depending on how many cours it gets.

Quick note

There’s a lot of confusing fan discussion online because some posts use “season 2” to mean different things, but the older official season 2 count is 51.

TL;DR

  • Old Black Clover season 2: 51 episodes.
  • New/comeback season: episode count not officially confirmed yet; estimates range from 12 to 24.