Web Spider

Cyber Peacock

Storm Owl

Magma Dragoon

X

The strategy with X is very straightforward. Spam level-1 charged shots at Magma Dragoon; he has very little invincibility frames from those charge shots, so they're X's best form of DPS. Predict when he'll jump over you, so you can jump and shoot him while he's jumping. If you have Double Cyclone, use that as the last blow to Magma Dragoon.

Zero

Zero's best way to damage Magma Dragoon is to SDC him. While Magma Dragoon is hadoukening, squeeze in a few SDCs between each jump. You can't predict his shoryuken 100%, so either tank the hit while SDCing, or back off; use your best judgement depending on how much health you have. If he's crouching still for his flamethrower or raining fire attack, this is your best chance to SDC him.

Jet Stingray

Split Mushroom

Slash Beast

X

You should have Ground Hunter when fighting this boss. Alternate between uncharged and charged Ground Hunter shots on Slash Beast. Every time he gets hit by ground hunter, he will always stagger then shoot forward; jump over him and hit him with your next shot. Charged Ground Hunter shots do 1 more damage than uncharged, which saves one round.

Zero

Slash Beast is very vulnerable to SDCing. As such, SDC him at every possible opportunity, especially when he stands still and roars. The good patterns are when he jumps to try to stomp you; dash out of the way and SDC him until he jumps again. You may take a lot of damage during this fight, because you likely won't bother to dodge his slashing attacks if he does them.

Frost Walrus

Colonel 1

Colonel 2

Double

Only X fights Double.

Use Double Cyclone, as that is Double's weakness. Charged double cyclones do the same amount of damage as uncharged, so don't bother wasting your weapon energy nor charge time.

Iris

Only Zero fights Iris.

Use short-jumps kuenbuu to damage Iris and the purple diamond that appears. Simply do short-hops, kuenbuu, then land and repeat very quickly in a rhythmic fashion. Use Ryuenjin as the final blow. If done properly, you should be able to finish Iris before the big laser attack.

General

Sigma

X

X can take out reaper sigma in one round very quickly. Use two charged rising fires on him; you will likely take a hit in between. If done quickly enough he'll go down instantly. If not, use a charged rising fire the next time he appears.

Phase 2 Sigma is weak to electric web. He has two attacks he'll alternate between: Swing the scythe in a circle, and throw his scythe at you. Make sure for the latter attack, you make his scythe go into the wall or else he'll use a boomerang attack that is near impossible to dodge; if his scythe is in the wall, he'll go in the corner and shoot lasers, where he'll be stationary and vulnerable for a long time.

Every time you hit him with an uncharged electric web, walljump off of the web to clear it quickly so you can shoot another one sooner. When sigma is in the corner shooting his lasers, be sure to shoot the web off screen so you can fire more rapidly.

Zero

Zero can only damage reaper sigma via Ryuenjin. Sigma will appear twice; you can cut off his attack with one Ryuenjin each. Then he'll appear at one side of the room. Immediately Ryuenjin the moment he appears, take a hit, then Ryuenjin him as he dashes across the screen; you should damage him twice during this attack. Repeat this entire process; if done properly, you should be able to finish him after his second dash attack.

Phase 2 Sigma is vulnerable to SDC. He has two attacks he'll alternate between: Swing the scythe in a circle, and throw his scythe at you. Make sure for the latter attack, you make his scythe go into the wall or else he'll use a boomerang attack that is near impossible to dodge; if his scythe is in the wall, he'll go in the corner and shoot lasers, where he'll be stationary and vulnerable for a long time.

When he's on the ground, SDC him a little bit; when he jumps in the air and throws his scythe in a circle, use kuenbuu and/or giga attacks. When he uses his laser attack, get behind him, take a hit, and SDC him. You should easily be able to finish him before his second round of attacks ends.

Boss Damage Chart