It is tradition for Samus to remove her Power Suit and reveal her true self in the Justin Bailey, Ending Outfit or Zero Suit in the best endings, which also say "See you next mission" when the item percentage and completion time are displayed.
The Japanese versions contains an additional set of endings that show images of Samus' past rather than the adult Samus in revealing attire. These are shown when the game is cleared with Child Mode. Linking to Metroid: Zero Mission with the Game Boy Advance Game Link cable will unlock all endings, including Japanese-only endings, for a special gallery.
Samus will stand against a space background in various poses before clenching her fist. Each ending, upon acquisition, will be added to a gallery in the menu. The endings for Metroid Fusion can be unlocked by linking the two games with the Nintendo GameCube Game Boy Advance Cable.
Acquired by completing the game on Easy Mode, or over four hours without 100% items.
Acquired by completing the game on Normal or Hard Mode, over two hours without 100% items.
Acquired by completing the game on Normal or Hard Mode, under two hours and under 100% items.
Acquired by completing the game on Normal Mode and with 100% items.
Acquired by completing the game on Normal Mode, under two hours and with 100% items.
Acquired by completing the game on Hard Mode, under two hours and with 100% items.
Acquired by completing the game on Normal Mode with 15% or less items.
Acquired by completing the game on Hard Mode with 15% or less items.
Samus will appear out of nowhere when it appears she had been lost in the destruction of Phaaze. She then heads to SkyTown, Elysia to mourn her fallen comrades before heading off into the unknown. Meanwhile, a mysterious spacecraft appears and follows Samus. The identity of this craft's pilot was confirmed to be Sylux from Metroid Prime Hunters at E3 2015.Kensuke Tanabe, the producer of the Metroid Prime series, expressed interest in creating a future Prime game which continues the rivalry between Samus and Sylux. This game would involve the Galactic Federation, whose role is to be expanded upon in Metroid Prime: Federation Force.
The worst ending, Acquired by completing the game with less than 75% items.
The fair ending, Acquired by completing the game with between 75%-99% items.
The best ending, Acquired by completing the game with 100% items.
As stated, there are no traditional endings in Other M. However, Samus will congratulate the player in voiceover on the item percentage screen. Depending on their final percentage, these messages are heard:
Some endings may have been inspired by that of Alien and Aliens, films which heavily influenced Metroid. At the end of both films, the female protagonist, Ripley, is scantily clad as she prepares for hypersleep.
The Super Metroid ending is mirrored in Samus' congratulations montage in Super Smash Bros. for Wii U. In one scene, Samus is seen jumping up offscreen, and falling back down in her Zero Suit form, clad in her Ending Outfit from Fusion.