Despite its flaws Jujutsu Kaisen will probably always be one of my favorite battle shounen. I love so much how

::: Season 1 Jujutsu Kaisen power system spoiler

Characters canonically power up by monologueing about what their powers do in the middle of battle, and there are even instances where characters hold back information while doing so to trick their opponent.

The only shounen that does not follow this formula off the top of my head is

Don’t forget Fullmetal Alchemist!