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Crisis Makes Perfect would also apply for more general skills/accomplishments if it was something they had been working on, like controlling their temper or Face Your Fears
Monster of the Aesop is a long-time favorite pairing for shonen-type series (especially for Power Rangers), where the villain is thematically linked to whatever they're trying to master or overcome. (The physical-combat-based hero faces an Intangible Man with brief moments of vulnerability as their mentor tries to teach them that Attack! Attack! Attack! can't win every fight)
Edited by Scorpion451
this is more of a "do we have this trope" but I think it happens in Power Rangers a lot and it's like Die or Fly but without gaining super powers
Edit: the trope I was originally describing was Crisis Makes Perfect but after looking at it I realized I was looking for a more broad "you have to get over a Fatal Flaw in order to fight a villain"
Edited by Wild-Starfish