This fight is especially frustrating because it is timed, and learning how to damage Dark Samus can be difficult. Dark Samus will first fly around and stay far away from you. This is perfect time to scan her. If you get too close to her, she will set off an explosion to blow you away. Shoot her with charged Power Beam shots until she starts glowing light blue. She is then invulnerable. When she renders herself invisible, switch to the Echo Visor to see her. Shoot her until she either disappears or becomes invisible. When she takes enough damage, she will move to the middle of the arena and form a shield around herself, causing her to become invulnerable once more. You can scan her again at this time because she is now in a new form. Dark Samus will shoot you with powerful Phazon shots. These can be easily avoided by side-dashing. Occasionally she will expel small amounts of Light Phazon. With your Charge Beam charged, you must collect these small amounts of Phazon until your Arm Cannon glows blue. Then, shoot Dark Samus and she will take heavy damage. The frustrating part about collecting the Phazon is that you must manually collect it as it falls to you -- simply standing there will not do it. Note: While collecting the Phazon, you must try not to get hit by any stray pieces of Phazon, as it will cause you to lower your weapon and lose the charge. After Dark Samus is defeated, a short intermission sequence will begin and the credits will roll. Note: If you die while fighting Dark Samus, the game will ask if you wish to continue from last save. If you choose "Yes", you will not have to fight Emperor Ing again. Instead, it will cut to the scene where Emperor Ing dies.
