Mega Man X Walkthrough

Havok Highway: Vile
Here it is, the first stage. Head right to meet your first enemy of the game: a Spiky (a spiked wheel). Charge up your X-Buster and defeat it. Behind it is a Gun Volt (a blue robot with no arms and two legs). Jump over it's sparks and missles and destroy it. After it, jump across the gap and run past the semi in the background. You'll find around 8 Crushers (robots with spikes) that can tear up the road. Defeat them. Moving on, you'll find another Spiky and another Gun Volt. Get rid of them. You'll soon find another Gun Volt. Dispatch it. Jump over the gap and face your first miniboss: A bee helicopter called a B Blader.

Final Sigma Stage: Core
This stage is simple, just wall climb, defeating the Iworms and fill up your Sub-Tanks, your Rolling Shield, your Shotgun Ice, and your Electric Spark. When you're ready, climb up the walls and enter the gates. At the top, you'll find Sigma himself, but first he talks a bit, then he sics his pet dog, named Velguarder, at you. Velguarder is very agile, and can breathe either ice (wich moves in a rainbow pattern) or fire (which travels in an upwards arc). Dispactch Velguarder with the X-Buster, the Hadouken, or the Shotgun Ice. After a second speech Sigma removes his cape and draws his lightsaber, then the fight begins. Avoid his lightsaber and hit him with the Electric Spark when he's on the walls. After the fight, Sigma becomes his final form: Velguarder Sigma. Sigma's head will attach itself to a large wolf-shaped machine. Sigma is too high to hit, so you'll have to jump on his claws when they fall down(you'll get hit if you stand underneath them), but beware, as he shoots lightning from them. Sigma can also fire lasers and breath fire.