Mega Man X2/Upgrades

Leg Upgrade (Mid-Air Dash)

 * Stage: Overdrive Ostrich
 * Items Needed: Spin Wheel

Helmet Upgrade (RADAR)

 * Stage: Crystal Snail
 * Items Needed: None

Body Armor Upgrade (G. Crush)

 * Stage: Morph Moth
 * Items Needed: Spin Wheel

X Buster Upgrade

 * Stage: Wheel Gator
 * Items Needed: Mid-Air Dash