Use the following trick to one-hit-kill Metroid Hatchers and Metroids. It requires the Nova Beam and X-ray Visor. Turn on your X-ray and lock on to either a Metroid Hatcher or Metroid. When you lock on, notice a red spot and an "up close" of the enemy will appear. If you can shoot this spot the creature will die instantly. Note: These are not the only creatures this affects. Pirate Commandos are also affected, and this technique must be used on Omega Ridley.

Use the following trick to kill the Metroid Hatchers. Switch to your X-Ray visor and shoot the reddest spot only once. That should kill it. It saves a lot of problems because you do not have to rip off all the tentacles. This also works with normal "Phazon Metroids", especially since they keep phasing out of the time space.