I wrote a chintzy Preact app that pulls the source for a Pokemon Red hack from Github and makes Pokemon stats, moves, type matchups, etc. searchable [1] because enough has changed from the original that I wanted a quick reference for my current playthrough. I literally wrote in the TODOs in the README

  Generate proper AST from asm source and ditch janky Regex parsing?

because I felt guilty about doing things like

   const match = l.match(/\s*move\s*(\w+),\s*(\w+),\s*(\d+),\s*(\w+),\s*(\d+),\s*(\d+)\s*(.*)/)

Maybe I shouldn't be so hard on myself.

[1] https://github.com/alexjplant/rgbdex