Pareil, je l'ai battu assez facilement une fois que j'ai lu cette faq, sinon, j'y serais encore. Ce boss mis à part, la difficulté est assez équlibrée et ce jeu m'a scotché jusqu'à la fin.
J'attends la suite de pied ferme, en attendant je me fais les Castlevania tranquillou.

Comment battre ce foutu boss?
Par ici:
Nightmare can be a very hard boss if you are not proficient with the Space
Jump. Anyway, it's all about falling into safe predictable patterns. Firstly,
you want to wait for Nightmare to fire its lasers, quickly jump them (the
higher you jump the better), then dash under it and offload one or two Ice
Missiles into the flashing thing under it and then quickly retreat back to
the left. Rinse and repeat this pattern. After four Ice Missiles it will engage
its gravity manipulator; this will make the screen wavy and reddish. Keep the
same attack pattern but with some slight changes. You will now have to use
Charged Shots, as Ice Missiles will be deflected down because of the gravity
field. You'll also have to stay out its way as the Nightmare sways back and
forth.

Once the front panel explodes revealing a gelatinous grotesque creature, things
will begin to heat up. So jump up onto the ladder in line with the center of
this "face" and offload as many Missiles as you can until he gets really close.
Which is when you should climb to the top of the ladder and spin jump over him.
Now, the Nightmare will begin to actively hunt you. So begin to Space Jump away
from him (without touching the ground or Nightmare) and begin to encircle the
room in an orbit. This will go forever unless you float relatively still
directly in front of his face. So do a couple of revolutions of the room, then
float near the ladder and he should stop ("should" being the operative word).
Now grab onto the ladder and offload missiles directly at his face. If you
can't attack him from the ladder, jump up and shoot the Ice Missiles at his
face. There is only a very small window in which you can shoot the Ice Missiles
through to hit him. After his face gets really droopy and red, he will explode
into a Core-X. Destroy the thorny membrane with 6 Ice Missiles, then absorb the
Core-X to regain Samus's Gravity Suit.



Je m'y suis pris a de nombreuses reprises, mais ne vous inquietez pas après tout passe bien. Faites gaffe a avoir assez de batteries dans vos GBA, histoire que ça s'éteigne pas a la fin du combat.

Tiens, toi aussi tu as laissé tomber là?
(en plus moi c'est sur une GBA standard, j'ai mal aux yeux rien que d'y penser )

Ca a l'air interessant mais si il faut trouver des passages secrets pour avancer comme dans les autres Metroid, très peu pour moi.
J'ai pas l'intention de me le prendre.

J'ai toujours pas réussi à finir le Fusion
Je suis toujours bloqué au boss qui modifie la gravité. J'ai essayé sur la SP, je me suis ruiné les mains. J'ai essayé avec le GB Player mais avec il n'y a pas moyen avec la manette GC. Alors, le Zero Mission, pour le moment...

Avec des vidéos, screenshots etc
Sortie prévue en février sur GBA c'est ça?

http://www.metroid.com/zeromission/prelaunch/index2.html