When fighting Metal Shark Player, he resurrects Reploids from previous MegaMan X games to help him. He will rarely call up Blast Hornett from Megaman X3.

In the last battle with Sigma, the music is a combination from the final Sigma battles in Mega Man X and Mega Man X2.

When fighting Metal Shark Player, he will sometimes call Magna Centipide from Megaman X2. Play as X, and charge up the Metal Anchor all the way. When released, a metallic version of Storm Eagle from Megaman X1 will rain down on your enemies.

Nightmare effects

Amazon Area, Laser Institute: Metallic gnats (very pesky)
Amazon Area, Magma Area: Metallic gnats
Inami Temple, Amazon Area: Normal rain (slows you down)
Inami Temple, Central Museum: Normal rain
Magma Area, North Pole Area: Magma rain. Also, some walls break an allow access to secret area.
Magma Area, Weapon Center: Magma rain.
Weapon Center, Amazon Area: Spotlights (dispiriting and very difficult to maneuver with)
Weapon Center, Inami Temple: Spotlights
Laser Institute, North Pole Area: Soul spirits (attacking soul clones of Zero/X, respectively)
Laser Institute, Inami Temple: Soul spirits
North Pole Area, Recycle Lab: Iced floors
Recycle Lab, Magma Area: Iron blocks
Recycle Lab, Weapon Center: Iron blocks
Recycle Lab, Central Museum: Iron blocks
Central Museum, Recycle Lab: Red, blue and black crates
Central Museum, Laser Institute: Red, blue and black crates

Weeeeird

# There are some (rather consistent) spelling errors (“overwright”) and grammatical errors (the writers love putting the words “are” and “the” in awkward places).
# Even though the manual says (several times) that Zero is a special A-class Hunter, he starts off at level D.
# Both X and Zero can use the Saber even after you find Zero. Evidently this is the reason only one of them can investigate a stage at a time. (“Here, take my Saber; I’ll just hang out here until you’re done.”)
# When you start the game using the Ultimate Armor, Alia’s dialogue about fixing the Falcon Armor is still the same, even though you’re not wearing it.

I have finished the game and defeating gate would be the hardest boss fight. But it'll be easy if you follow this steps:
1.the ultimate armor would do the job
2.gate will follow you to inflict damage, when he's coming giga atk on the other side
3.when gate unleashes those magic balls, wait for it to glow. Then giga atk ABOVE it so the balls will explode and hit gate. Don't hit completely or else the "nutrients" will explode before it hits gate.

Just follow this steps and your life will be 3/4 and gate's is almost ZERO!

To get Zero go to Laser Institute/Shield Sheldon there will be two ways, go down keep on going and go into the blue light then you keep going until you find a door go in you will find a room Zero will appear use the z-saber on him once you defeat him he will go to your side and you get to play as him.

BLADE ARMOR

Commander Yammark (Foot)- At the beginning, go through the level normally. When you see the first butterfly, kill it. Then go down. There should be a dragon-like monster thingy that revives after it is killed. After killing it, go to the right (the pathway behind it). A reploid should be there near the capsule.

Shield Sheldon (Body)- On the part with two doors (one on the side one on the bottom),
Go down. Then, after going through the next door (another one leading down), go THROUGH the wall. Its ok, you can go through. There should be 2 reploids and the capsule.

Infinity Mijinion (Arm)- After killing Illumina, the blue crystal portal thing should appear. Go to it. Once you start the level go left. A heart and the capsule are there.

Ground Scaravich (Head)- You have to be lucky to do this. The capsule is at the center of a certain area.

SHADOW ARMOR

Metal Shark Player (Head)- At the part with the ladder, go straight toward the path. Dash your quickest, so you do not get killed. Jump across the BIG and DEEP and LONG pit. A reploid, a heart and the capsule is located there.

Rainy Turtloid (Body)- Near the end, do a small mach dash through the row of spikes across the first level. A reploid is found there. Do another mach dash across the second row of spikes you will see. The capsule is there.

Blaze Heatnix (Arm)- After beating 2 mini-bosses, go upward after entering the door. Go only in this level if heatnix's face is not red after you beat him. Ride the metal block upward to get to the reploid. Go up even more to find the capsule.

Blizzard Wolfang (Foot)- After the last continous avalanche, do another big jump. The capsule is found there.

Hope this helps. Please answer my question at the questions part.

To kill Gamma Sigma (The last boss) in only two or three attacks, you'll need Shadow armor.

Go and fight him and when his mouth opens, use shadow armor giga attack or charge the square attack and strike him.

You have to be quick to do a lot of damage, and remember you can only hurt Gamma Sigma when his mouth opens up. When it is opened, quickly strike before it closes.

I used the charged square attack 2 times against him and I killed him. It may seem hard, but it really isn't. I've done it many times,
sometimes it takes me 3 strikes to kill him.

It's also possible to kill him in 1 strike, but it's very difficult to do. I know someone who killed him in one attack, and I'm trying to do it too.

I hoped that this helped you.

There is another way to defeat HighMax with Zero, first defeat Ground Scarbinch then go to Shieldsheldon's place, go to the bottom part, then you will meet HighMax and use Ground Scarbinch's power or when he starts blinking hit him with the Z-saber