Mega Man X2/Upgrades

Leg Upgrade (Mid-Air Dash)

 * Stage: Overdrive Ostrich
 * Items needed: Spin Wheel

This upgrade is at the end of the stage before you enter the door to the rocket. Before you drop down to the door do a skip jump across the gap to a ledge that is blocked. You'll need to use the attack, spin wheel, to destroy the blocks blocking your way, inside is a small room with a capsule. Enter the capsule to gain the Leg Upgrade. To use this upgrade jump then hit the dash button to preform the mid-air dash.

Helmet (RADAR)
Towards the middle of the level, after you slide down the slippery crystal hill with the green crystal block chasing after you, there is a big chasm. What you do is slide down the left wall of the chasm and there will be a path with some stationary enemies. Destroy them and keep going left until you find the capsule with the helmet (RADAR) upgrade. This upgrade allows you to find hidden passages elsewhere in the game when equipped. When using the RADAR you cannot use your X- buster or any other weapon.
 * Stage: Crystal Snail
 * Items needed: None

Body Armor (G. Crush)

 * Stage: Morph Moth
 * Items needed: Spin Wheel

In beginning, progress the game until you defeated all reploids. After destroying all reploids, you're come across two orange columns. Directly after the second column, jump up and equip the spin wheel, then shoot it to the right. The wheel will dig down and make a hole so you can reach the upgrade capsule below.

X- Buster
Towards the begining of the stage after you go down the two ladders, and before you jump down the hole to the rocket platform, climb up the wall on the right. There will be a small overhang to the left and another longer overhang a short distance to the left of the smaller one, in the middle is a small hole. Make X grab a hold of the smaller over hang using mid-air dash. Then let Mega Man slide off the small over hang as soon as he lets go do another mid-air dash to grab the longer overhang. After that climb to the top of the small hole and the capsule contaning the X-buster upgrade should be on the right side of the room. This upgrade allows X to charge up and shoot two powerful shots from both arms. It also allows X to charge all of the other special weapons he gains.
 * Stage: Wheel Gator
 * Items Needed: Mid-Air Dash