Here's some ASM I made based on the Power Rush item from the first two Paper Mario games. Whenever Samus is at or below 30 Energy, she deals double damage with her attacks. In its current state, the patch works on the entire hack. At some point, I plan to make it its own item, but I'm putting it out there now in case anyone wants to try it out.

Something to note: The damage doubling doesn't apply to Speed Booster, Screw Attack, or Shinespark damage. This won't affect normal hacks, but if you edited how much damage any of those things deal, you'll have to edit the ASM yourself if you want the effect to apply to them.